This document defines and discusses soil mechanics, geotechnical engineering, foundation engineering, the role of a foundation engineer, and classifications of foundations. It provides details on:
1) The differences between soil mechanics, geotechnical engineering, and foundation engineering.
2) The steps and responsibilities involved in designing a foundation as a foundation engineer.
3) The four main performance requirements for foundations: strength, serviceability, constructibility, and economic requirements.
4) The classifications of shallow foundations which include spread footings, strap footings, combined footings, raft/mat foundations, and deep footings. It also defines various deep foundation types such as pile foundations, pier foundations, caissons
This document outlines the course details for CE-205 Soil Mechanics-1 including instructor information, schedule, credit hours, prerequisites, description, teaching objectives, reference books, learning objectives, expected course outcomes, topics to be covered, laboratory projects, and how the course contributes to ABET outcomes. The course aims to teach basic soil mechanics principles and properties through lectures, assignments, and laboratory testing to develop students' understanding and skills in soil mechanics applications.
This document provides information about the Engineering Geology and Seismology course CE-312 at UET Peshawar. It includes the instructor's contact information, course objectives to understand geologic factors that influence civil engineering projects and earthquakes, an overview of the engineering geology and seismology topics covered, recommended textbooks, grading criteria which includes exams, assignments, and a group project, and examples of what can happen when geology is ignored in civil projects or how geology can also be interesting to study.
This document provides an introduction and overview of a textbook on soil behavior in civil and environmental engineering. It discusses how soils influence engineering projects and their properties can be difficult to characterize due to unclear boundaries, variable material properties, and stress-dependent behavior. The objectives of the textbook are to provide an understanding of soil engineering properties, composition, structure, and behavior and how this relates to solving geotechnical problems. It aims to answer questions beyond traditional soil mechanics about topics like composition, geological history, effective stress, time-dependent behavior, environmental impacts, and flow through soils.
This document outlines the course details for CE-205 Soil Mechanics-1 including instructor information, schedule, credit hours, prerequisites, description, teaching objectives, reference books, learning objectives, expected course outcomes, topics to be covered, and laboratory projects. The course aims to teach students about basic soil properties, classification, exploration, compaction, permeability, shear strength, and laboratory and field testing through lectures, assignments, and hands-on experiments.
This document provides an overview of geotechnical site investigation. It discusses the history and development of site investigations, different approaches to site investigations from desk studies to limited investigations with monitoring, and the typical sequence of a geotechnical site investigation. It also describes various subsurface exploration techniques including geophysics, boring, drilling, probing, and in situ testing methods.
This document defines soil mechanics and geotechnical engineering. Soil mechanics is the study of soil behavior, providing the theoretical basis for geotechnical engineering. Geotechnical engineering uses soil mechanics, rock mechanics, and engineering geology principles to investigate subsurface conditions, evaluate stability of natural slopes and structures, assess risks from site conditions, and design earthworks and foundations. A typical geotechnical engineering project involves site investigation, determination of material properties, and design of foundations and earthworks for intended structures.
Engineering geology is a branch of applied geology that deals with the application of geological knowledge and principles to civil engineering projects. It provides essential information for safe, stable, and economical design and construction of structures like buildings, dams, roads, and tunnels. Engineering geological studies are conducted during planning, design, construction, and post-construction phases of projects. The studies help understand site conditions, availability of construction materials, and how to mitigate geological hazards. Knowledge of geology is crucial for heavy construction projects and excavation works to plan realistically and design sound foundations.
Engineering geology involves the application of geology to construction projects. It is concerned with the rock and soil conditions of construction sites. Engineering geology provides information vital for planning, designing, and building structures like dams, bridges, and buildings. It examines the geology, geomorphology, and material properties of construction sites to understand subsurface conditions, availability of construction materials, and geologic hazards that could impact structures. Subdisciplines of engineering geology include physical geology, geomorphology, mineralogy, petrology, and economic geology. It aids in site selection, foundation design, and town planning by considering the geologic factors that influence construction and development.
This document outlines the course details for CE-205 Soil Mechanics-1 including instructor information, schedule, credit hours, prerequisites, description, teaching objectives, reference books, learning objectives, expected course outcomes, topics to be covered, laboratory projects, and how the course contributes to ABET outcomes. The course aims to teach basic soil mechanics principles and properties through lectures, assignments, and laboratory testing to develop students' understanding and skills in soil mechanics applications.
This document provides information about the Engineering Geology and Seismology course CE-312 at UET Peshawar. It includes the instructor's contact information, course objectives to understand geologic factors that influence civil engineering projects and earthquakes, an overview of the engineering geology and seismology topics covered, recommended textbooks, grading criteria which includes exams, assignments, and a group project, and examples of what can happen when geology is ignored in civil projects or how geology can also be interesting to study.
This document provides an introduction and overview of a textbook on soil behavior in civil and environmental engineering. It discusses how soils influence engineering projects and their properties can be difficult to characterize due to unclear boundaries, variable material properties, and stress-dependent behavior. The objectives of the textbook are to provide an understanding of soil engineering properties, composition, structure, and behavior and how this relates to solving geotechnical problems. It aims to answer questions beyond traditional soil mechanics about topics like composition, geological history, effective stress, time-dependent behavior, environmental impacts, and flow through soils.
This document outlines the course details for CE-205 Soil Mechanics-1 including instructor information, schedule, credit hours, prerequisites, description, teaching objectives, reference books, learning objectives, expected course outcomes, topics to be covered, and laboratory projects. The course aims to teach students about basic soil properties, classification, exploration, compaction, permeability, shear strength, and laboratory and field testing through lectures, assignments, and hands-on experiments.
This document provides an overview of geotechnical site investigation. It discusses the history and development of site investigations, different approaches to site investigations from desk studies to limited investigations with monitoring, and the typical sequence of a geotechnical site investigation. It also describes various subsurface exploration techniques including geophysics, boring, drilling, probing, and in situ testing methods.
This document defines soil mechanics and geotechnical engineering. Soil mechanics is the study of soil behavior, providing the theoretical basis for geotechnical engineering. Geotechnical engineering uses soil mechanics, rock mechanics, and engineering geology principles to investigate subsurface conditions, evaluate stability of natural slopes and structures, assess risks from site conditions, and design earthworks and foundations. A typical geotechnical engineering project involves site investigation, determination of material properties, and design of foundations and earthworks for intended structures.
Engineering geology is a branch of applied geology that deals with the application of geological knowledge and principles to civil engineering projects. It provides essential information for safe, stable, and economical design and construction of structures like buildings, dams, roads, and tunnels. Engineering geological studies are conducted during planning, design, construction, and post-construction phases of projects. The studies help understand site conditions, availability of construction materials, and how to mitigate geological hazards. Knowledge of geology is crucial for heavy construction projects and excavation works to plan realistically and design sound foundations.
Engineering geology involves the application of geology to construction projects. It is concerned with the rock and soil conditions of construction sites. Engineering geology provides information vital for planning, designing, and building structures like dams, bridges, and buildings. It examines the geology, geomorphology, and material properties of construction sites to understand subsurface conditions, availability of construction materials, and geologic hazards that could impact structures. Subdisciplines of engineering geology include physical geology, geomorphology, mineralogy, petrology, and economic geology. It aids in site selection, foundation design, and town planning by considering the geologic factors that influence construction and development.
Engineering geology involves applying geological principles to engineering projects. It requires studying the geology of an area to ensure geological factors will not negatively impact projects. The document outlines the basic knowledge required for engineering geology, which includes understanding rock and soil types, their properties, and how they are influenced by geologic processes and structures. It also discusses various methods used in geological investigations and their applications to engineering projects.
The document discusses the subject, scope, and subdivisions of geology. It states that geology is the study of the origin, composition, and structure of the Earth. The main subdivisions of geology include physical geology, geomorphology, mineralogy, petrology, economic geology, and historical geology. Engineering geology also has applications in construction projects, planning, and town and regional planning by providing geological data and assessing rock properties.
This is a presentation onEngineering Geology.
It contains-
>>Meaning
>>Definition
>>Objective
>>Scope in Construction;Water Resource Developement;Town and Regional Planning.
>>Age Of Earth.
---------------------------------------------------------------------------------------------------------------------------
This document provides an introduction to geotechnical engineering and soil mechanics. It defines soil and discusses the branches of civil engineering related to soil, including foundation engineering. The document then discusses the history and development of soil engineering, from early uses of soil as a construction material through the classical and modern eras. It outlines key figures and their contributions, particularly highlighting Karl Terzaghi's role in establishing modern soil mechanics. The document also covers the scope of geotechnical engineering, including applications in foundation design, retaining structures, slope stability, pavement design, and earth dam design. It concludes with some limitations of geotechnical engineering given soil properties can vary significantly by location.
Geology is the scientific study of the all constituents of planets, their internal and external forms and processes. More precisely, it is the study of nature, structure and history of the planet. Earth is the home to all life, well known to the humankind. Geology, itself, is a major part of The Earth and atmospheric sciences, which were born as twins . The subject of geology encompasses all aspects including the composition, structure, physical properties, and history of a planets'( like Earth's) inter-related components and the processes that are shaping the features on the surface. Geologists are the scientists who study the origin, occurrence, distribution and utilities of all materials(metallic, non-metallic, inorganic, etc), minerals, rocks, sediments, soils, water, oil and all other inorganic natural resources. It is a very vast subject covering a wide spectrum of scientific principles and holding hundred and fifty plus scientific branches. This report enumerates and highlights most of them, in a nutshell, for all those who intends to know for planning their career path.
1.1 introduction of geology,Branches and Scope of GeologyRam Kumawat
This document discusses the branches and scope of geology. It outlines 15 branches of geology including physical geology, crystallography, mineralogy, petrology, structural geology, stratigraphy, paleontology, historical geology, economic geology, mining geology, civil engineering geology, hydrology, Indian geology, resources engineering, and photo geology. It then discusses the importance and scope of geology for civil engineering, including providing construction materials knowledge, helping with erosion and deposition projects, tunneling and foundations, and reducing engineering costs.
This document outlines laboratory experiments for a geotechnical engineering course, including determining liquid limit, plastic limit, dry density, particle size distribution, compaction, and specific gravity of soil. It describes how geotechnical investigations are performed through surface and subsurface exploration to obtain soil properties for engineering design, and notes tests will be conducted in groups and laboratory experiment reports should follow a specific format.
Geology is the study of the Earth, including its composition, structure, physical properties, history and the processes that shape it. It involves studying topics like the origin and age of the Earth, its internal structure, various surface features and how they evolve and change over time. Geology has many branches that study different aspects like physical geology, geomorphology, mineralogy, petrology, economic geology, geochemistry, geophysics, hydrogeology, mining geology, engineering geology and more. Civil engineers and geologists work closely together in areas like planning, designing and constructing major civil engineering projects to ensure their safety, stability and cost-effectiveness by understanding the geological conditions and properties of the construction site and materials.
Geology is the study of the physical structure and substance of the Earth. It provides knowledge about construction materials like stones and clay. It also helps understand natural geological processes like erosion that impact civil engineering projects. Geology is important for determining suitable foundations, exploring ground conditions via drilling, and planning major projects like dams, roads and tunnels. The study of geology includes physical geology, petrology, structural geology, and the weathering of rocks. Physical geology examines how the Earth's surface and interior change over time. Petrology studies the origin, composition and structure of different rock types. Structural geology analyzes the three-dimensional distribution of rocks and their deformation history. Weathering breaks down rocks through mechanical and chemical processes.
This document provides an introduction to geotechnical engineering. It defines soil mechanics and geotechnical engineering. It describes typical geotechnical projects which include investigating subsurface conditions, testing soil properties, and designing earthworks and foundations. It discusses shallow and deep foundation systems used to transfer building loads to the ground. It also describes retaining walls, excavation support systems, sheet piles, cofferdams, tunnels, earth dams, landslides, and mechanically stabilized earth walls. The document outlines geoenvironmental engineering topics and various soil testing and instrumentation methods. It discusses geotechnical engineering problems related to groundwater, excavations, earth slopes, and earthquakes. Finally, it presents various ground improvement techniques.
This document outlines the course objectives, outcomes, and units for an Engineering Geology course for Civil Engineering students. The objective is to provide students with the geological knowledge required for constructing civil engineering structures and identifying geological hazards. By the end of the course, students will be able to characterize sites geologically, understand engineering properties of earth materials, and characterize rock mass properties. The course covers topics like the importance of geology for civil engineering, rock weathering, mineralogy, petrology, structural geology, groundwater, earthquakes, landslides, geophysical studies, and the influence of geology on dams, reservoirs, and tunnels.
Geology is the study of the Earth, including its composition, structure, physical properties, history and processes. It includes disciplines like mineralogy, petrology, geomorphology, paleontology, stratigraphy, geochemistry, geophysics and oceanography. Geology has many applications and is important for understanding Earth's processes, evaluating natural resources, managing the environment, assessing geologic hazards, and other areas. The key branches of geology are physical geology, historical geology, mineralogy, petrology, economic geology, engineering geology, paleontology, and environmental geology. Geology plays an important role in mining, engineering, scientific development and other fields through applications like resource evaluation, site selection, and hazard assessment.
Geology is the study of the Earth, including its origin, structure, composition and processes that have shaped it over time. It involves studying the Earth through observation, analysis and synthesis at locations like libraries, laboratories, museums and field sites. Geology is related to other sciences and has many branches of study. It is important to study geology because geological processes and resources influence human civilization, environments and hazards, and geology underpins engineering and understanding of landforms and Earth's history.
Geology is the study of the Earth, including its composition, structure, physical properties, history and the processes that shape it. The document outlines several key branches of geology, including economic geology, mining geology, petroleum geology, engineering geology, environmental geology, geochemistry, geomorphology, geophysics, historical geology, hydrogeology, mineralogy, paleontology, petrology, structural geology, sedimentology, stratigraphy and volcanology. Each branch deals with different aspects of the Earth and geological processes. Engineering geology specifically applies geological knowledge to civil engineering projects regarding construction materials, site selection, and safe design and construction.
1. Geology is the science that studies the physical structure and composition of the Earth, as well as the processes that act on it.
2. Geology provides knowledge about construction materials like stones and clay that are important for civil engineering projects. It also helps understand natural geological processes like erosion that impact projects.
3. Geology is important for understanding groundwater resources and interpreting drilling data for projects like dams and bridges to ensure stable foundations.
This document provides an overview and introduction to a course on geotechnical engineering at Chinhoyi University of Technology. It covers topics like soil formation, properties of soils, soil classification, soil compaction and permeability. It discusses soil mechanics, different types of soils like residual and alluvial soils. It also explains concepts like weathering, clay mineralogy, basic structural units and types of clay minerals like kaolinite, montmorillonite and illite. The document is intended to help students understand the key principles and applications of soil mechanics in engineering.
CONSTRUCTIVE METHODS OF PROTECTING BUILDINGS FROM SEISMIC EXPOSUREIAEME Publication
This article discusses approaches to assessing the seismic impact on the
underground parts of buildings and structures and analyzes possible measures to
minimize them.
The development of promising methods of constructive seismic protection dictated
by the imperative need and requirements of improving the safety of buildings and
structures of enhanced security is given. Without knowledge of the real geodynamic
risks (the impact of earthquakes, fluctuations in the level of groundwater), investing of
funds in seismic safety will be ineffective.
The main objective of the research is to develop a set of measures for assessing the
seismic-geotechnical situation of the construction site due to the fact that at present:
taking into account difficult ground conditions is estimated very roughly, the
seismicity of the territory is determined by averaged indicators; geodynamic data
(score) is insufficient for modeling and calculating the underground part of the
building; there is no practice of a comprehensive study of the system (the soil
foundation - the underground part - the upper structure) before and after
construction.
On the basis of detailed initial data of seismic micro zoning it is possible to
perform clarification of seismic hazard and to provide effective measures of seismic
protection of high-rise buildings. The analysis of modern methods of structural
protection of buildings in earthquake-prone areas. The classification of existing
systems of classical seismic protection on the principle of their work is presented. The
main methods are analyzed and the general conclusions and principles of seismic
protection of individual structures and buildings are formulated as a whole.
The variants of design solutions for the construction of foundations with a
separation layer, design and methods of construction of vertical and horizontal
geotechnical barriers are considered. The main advantages and disadvantages of the
described methods are given.
The main tendency of development of seismic protection of buildings is defined
and the direction of further researches is chosen: collecting and the analysis
This document provides an overview of geology presented by Dinesh Sonwane. It defines geology as the study of the solid matter that constitutes the Earth, encompassing rocks, soil, gemstones. It discusses the various branches of geology including physical geology, geomorphology, mineralogy, petrology, structural geology, stratigraphy, paleontology, historical geology, applied geology, and the relationship between geology and other fields. The document also defines a mineral, describes the three main types of rocks and their uses, and provides brief explanations of structural geology and paleontology. It was presented by Dinesh Sonwane to his class on the topic of geology.
Geotechnical engineering is concerned with engineering behavior of earth materials. It uses principles of soil and rock mechanics to investigate subsurface conditions, determine material properties, evaluate stability, assess risks, design foundations and earthworks, and monitor sites. A typical project involves reviewing needs, investigating the site through borings, laboratory testing, and assessing risks from natural hazards. Geotechnical engineers then design appropriate foundations and earthworks. Subsurface investigations characterize subsurface conditions and allow engineers to evaluate how earth will behave under structural loads.
This document outlines the course details for CE-205 Soil Mechanics-1 including instructor information, schedule, credit hours, prerequisites, description, teaching objectives, reference books, learning objectives, expected course outcomes, topics to be covered, and laboratory projects. The course aims to teach students about basic soil properties, classification, exploration, compaction, permeability, shear strength, and laboratory and field testing through lectures, assignments, and hands-on experiments.
Engineering geology involves applying geological principles to engineering projects. It requires studying the geology of an area to ensure geological factors will not negatively impact projects. The document outlines the basic knowledge required for engineering geology, which includes understanding rock and soil types, their properties, and how they are influenced by geologic processes and structures. It also discusses various methods used in geological investigations and their applications to engineering projects.
The document discusses the subject, scope, and subdivisions of geology. It states that geology is the study of the origin, composition, and structure of the Earth. The main subdivisions of geology include physical geology, geomorphology, mineralogy, petrology, economic geology, and historical geology. Engineering geology also has applications in construction projects, planning, and town and regional planning by providing geological data and assessing rock properties.
This is a presentation onEngineering Geology.
It contains-
>>Meaning
>>Definition
>>Objective
>>Scope in Construction;Water Resource Developement;Town and Regional Planning.
>>Age Of Earth.
---------------------------------------------------------------------------------------------------------------------------
This document provides an introduction to geotechnical engineering and soil mechanics. It defines soil and discusses the branches of civil engineering related to soil, including foundation engineering. The document then discusses the history and development of soil engineering, from early uses of soil as a construction material through the classical and modern eras. It outlines key figures and their contributions, particularly highlighting Karl Terzaghi's role in establishing modern soil mechanics. The document also covers the scope of geotechnical engineering, including applications in foundation design, retaining structures, slope stability, pavement design, and earth dam design. It concludes with some limitations of geotechnical engineering given soil properties can vary significantly by location.
Geology is the scientific study of the all constituents of planets, their internal and external forms and processes. More precisely, it is the study of nature, structure and history of the planet. Earth is the home to all life, well known to the humankind. Geology, itself, is a major part of The Earth and atmospheric sciences, which were born as twins . The subject of geology encompasses all aspects including the composition, structure, physical properties, and history of a planets'( like Earth's) inter-related components and the processes that are shaping the features on the surface. Geologists are the scientists who study the origin, occurrence, distribution and utilities of all materials(metallic, non-metallic, inorganic, etc), minerals, rocks, sediments, soils, water, oil and all other inorganic natural resources. It is a very vast subject covering a wide spectrum of scientific principles and holding hundred and fifty plus scientific branches. This report enumerates and highlights most of them, in a nutshell, for all those who intends to know for planning their career path.
1.1 introduction of geology,Branches and Scope of GeologyRam Kumawat
This document discusses the branches and scope of geology. It outlines 15 branches of geology including physical geology, crystallography, mineralogy, petrology, structural geology, stratigraphy, paleontology, historical geology, economic geology, mining geology, civil engineering geology, hydrology, Indian geology, resources engineering, and photo geology. It then discusses the importance and scope of geology for civil engineering, including providing construction materials knowledge, helping with erosion and deposition projects, tunneling and foundations, and reducing engineering costs.
This document outlines laboratory experiments for a geotechnical engineering course, including determining liquid limit, plastic limit, dry density, particle size distribution, compaction, and specific gravity of soil. It describes how geotechnical investigations are performed through surface and subsurface exploration to obtain soil properties for engineering design, and notes tests will be conducted in groups and laboratory experiment reports should follow a specific format.
Geology is the study of the Earth, including its composition, structure, physical properties, history and the processes that shape it. It involves studying topics like the origin and age of the Earth, its internal structure, various surface features and how they evolve and change over time. Geology has many branches that study different aspects like physical geology, geomorphology, mineralogy, petrology, economic geology, geochemistry, geophysics, hydrogeology, mining geology, engineering geology and more. Civil engineers and geologists work closely together in areas like planning, designing and constructing major civil engineering projects to ensure their safety, stability and cost-effectiveness by understanding the geological conditions and properties of the construction site and materials.
Geology is the study of the physical structure and substance of the Earth. It provides knowledge about construction materials like stones and clay. It also helps understand natural geological processes like erosion that impact civil engineering projects. Geology is important for determining suitable foundations, exploring ground conditions via drilling, and planning major projects like dams, roads and tunnels. The study of geology includes physical geology, petrology, structural geology, and the weathering of rocks. Physical geology examines how the Earth's surface and interior change over time. Petrology studies the origin, composition and structure of different rock types. Structural geology analyzes the three-dimensional distribution of rocks and their deformation history. Weathering breaks down rocks through mechanical and chemical processes.
This document provides an introduction to geotechnical engineering. It defines soil mechanics and geotechnical engineering. It describes typical geotechnical projects which include investigating subsurface conditions, testing soil properties, and designing earthworks and foundations. It discusses shallow and deep foundation systems used to transfer building loads to the ground. It also describes retaining walls, excavation support systems, sheet piles, cofferdams, tunnels, earth dams, landslides, and mechanically stabilized earth walls. The document outlines geoenvironmental engineering topics and various soil testing and instrumentation methods. It discusses geotechnical engineering problems related to groundwater, excavations, earth slopes, and earthquakes. Finally, it presents various ground improvement techniques.
This document outlines the course objectives, outcomes, and units for an Engineering Geology course for Civil Engineering students. The objective is to provide students with the geological knowledge required for constructing civil engineering structures and identifying geological hazards. By the end of the course, students will be able to characterize sites geologically, understand engineering properties of earth materials, and characterize rock mass properties. The course covers topics like the importance of geology for civil engineering, rock weathering, mineralogy, petrology, structural geology, groundwater, earthquakes, landslides, geophysical studies, and the influence of geology on dams, reservoirs, and tunnels.
Geology is the study of the Earth, including its composition, structure, physical properties, history and processes. It includes disciplines like mineralogy, petrology, geomorphology, paleontology, stratigraphy, geochemistry, geophysics and oceanography. Geology has many applications and is important for understanding Earth's processes, evaluating natural resources, managing the environment, assessing geologic hazards, and other areas. The key branches of geology are physical geology, historical geology, mineralogy, petrology, economic geology, engineering geology, paleontology, and environmental geology. Geology plays an important role in mining, engineering, scientific development and other fields through applications like resource evaluation, site selection, and hazard assessment.
Geology is the study of the Earth, including its origin, structure, composition and processes that have shaped it over time. It involves studying the Earth through observation, analysis and synthesis at locations like libraries, laboratories, museums and field sites. Geology is related to other sciences and has many branches of study. It is important to study geology because geological processes and resources influence human civilization, environments and hazards, and geology underpins engineering and understanding of landforms and Earth's history.
Geology is the study of the Earth, including its composition, structure, physical properties, history and the processes that shape it. The document outlines several key branches of geology, including economic geology, mining geology, petroleum geology, engineering geology, environmental geology, geochemistry, geomorphology, geophysics, historical geology, hydrogeology, mineralogy, paleontology, petrology, structural geology, sedimentology, stratigraphy and volcanology. Each branch deals with different aspects of the Earth and geological processes. Engineering geology specifically applies geological knowledge to civil engineering projects regarding construction materials, site selection, and safe design and construction.
1. Geology is the science that studies the physical structure and composition of the Earth, as well as the processes that act on it.
2. Geology provides knowledge about construction materials like stones and clay that are important for civil engineering projects. It also helps understand natural geological processes like erosion that impact projects.
3. Geology is important for understanding groundwater resources and interpreting drilling data for projects like dams and bridges to ensure stable foundations.
This document provides an overview and introduction to a course on geotechnical engineering at Chinhoyi University of Technology. It covers topics like soil formation, properties of soils, soil classification, soil compaction and permeability. It discusses soil mechanics, different types of soils like residual and alluvial soils. It also explains concepts like weathering, clay mineralogy, basic structural units and types of clay minerals like kaolinite, montmorillonite and illite. The document is intended to help students understand the key principles and applications of soil mechanics in engineering.
CONSTRUCTIVE METHODS OF PROTECTING BUILDINGS FROM SEISMIC EXPOSUREIAEME Publication
This article discusses approaches to assessing the seismic impact on the
underground parts of buildings and structures and analyzes possible measures to
minimize them.
The development of promising methods of constructive seismic protection dictated
by the imperative need and requirements of improving the safety of buildings and
structures of enhanced security is given. Without knowledge of the real geodynamic
risks (the impact of earthquakes, fluctuations in the level of groundwater), investing of
funds in seismic safety will be ineffective.
The main objective of the research is to develop a set of measures for assessing the
seismic-geotechnical situation of the construction site due to the fact that at present:
taking into account difficult ground conditions is estimated very roughly, the
seismicity of the territory is determined by averaged indicators; geodynamic data
(score) is insufficient for modeling and calculating the underground part of the
building; there is no practice of a comprehensive study of the system (the soil
foundation - the underground part - the upper structure) before and after
construction.
On the basis of detailed initial data of seismic micro zoning it is possible to
perform clarification of seismic hazard and to provide effective measures of seismic
protection of high-rise buildings. The analysis of modern methods of structural
protection of buildings in earthquake-prone areas. The classification of existing
systems of classical seismic protection on the principle of their work is presented. The
main methods are analyzed and the general conclusions and principles of seismic
protection of individual structures and buildings are formulated as a whole.
The variants of design solutions for the construction of foundations with a
separation layer, design and methods of construction of vertical and horizontal
geotechnical barriers are considered. The main advantages and disadvantages of the
described methods are given.
The main tendency of development of seismic protection of buildings is defined
and the direction of further researches is chosen: collecting and the analysis
This document provides an overview of geology presented by Dinesh Sonwane. It defines geology as the study of the solid matter that constitutes the Earth, encompassing rocks, soil, gemstones. It discusses the various branches of geology including physical geology, geomorphology, mineralogy, petrology, structural geology, stratigraphy, paleontology, historical geology, applied geology, and the relationship between geology and other fields. The document also defines a mineral, describes the three main types of rocks and their uses, and provides brief explanations of structural geology and paleontology. It was presented by Dinesh Sonwane to his class on the topic of geology.
Geotechnical engineering is concerned with engineering behavior of earth materials. It uses principles of soil and rock mechanics to investigate subsurface conditions, determine material properties, evaluate stability, assess risks, design foundations and earthworks, and monitor sites. A typical project involves reviewing needs, investigating the site through borings, laboratory testing, and assessing risks from natural hazards. Geotechnical engineers then design appropriate foundations and earthworks. Subsurface investigations characterize subsurface conditions and allow engineers to evaluate how earth will behave under structural loads.
This document outlines the course details for CE-205 Soil Mechanics-1 including instructor information, schedule, credit hours, prerequisites, description, teaching objectives, reference books, learning objectives, expected course outcomes, topics to be covered, and laboratory projects. The course aims to teach students about basic soil properties, classification, exploration, compaction, permeability, shear strength, and laboratory and field testing through lectures, assignments, and hands-on experiments.
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability.
Theoretical work submitted to the Journal should be original in its motivation or modeling structure. Empirical analysis should be based on a theoretical framework and should be capable of replication. It is expected that all materials required for replication (including computer programs and data sets) should be available upon request to the authors.
This document provides details about the Foundation Engineering course offered at the department of Mechanical and Civil Engineering. It includes information about the course code, credits, semester, pre-requisites, faculty teaching the course, old and new course patterns, teaching scheme, evaluation scheme, course objectives, course outcomes, unit-wise syllabus, pedagogy, reference books, and expert sessions. The course aims to provide knowledge about soil exploration techniques, shallow and deep foundation design, and foundations on problematic soils. It covers topics like soil properties, bearing capacity, pile foundations, expansive soils, and geosynthetics.
This document provides the curriculum for civil engineering courses in grades 11 and 12 in Nepal. It aims to produce mid-level civil engineering technicians with the necessary knowledge and skills. The curriculum covers topics like geo-technical engineering, road construction materials and testing, structural analysis and design, and maintenance and rehabilitation of structures. It includes the course structures, objectives, content, instructional methods, and evaluation schemes for each topic. Practical components involve lab tests, site visits, and projects. The goal is to equip students with the abilities required for jobs like inspecting construction projects, testing materials, and ensuring design specifications are met.
Sachpazis Costas: Geotechnical Engineering: A student's Perspective IntroductionDr.Costas Sachpazis
Geotechnical Engineering: A Student's Perspective
By Dr. Costas Sachpazis.
Geotechnical engineering is a branch of civil engineering that focuses on the behavior of earth materials such as soil and rock. It is a crucial aspect of any construction project, as the properties of the ground can have a significant impact on the design and stability of structures. Geotechnical engineers work to understand the physical and mechanical properties of soil and rock, as well as how these materials interact with man-made structures.
Geotechnical engineering plays a crucial role in the field of civil engineering, as it deals with the behavior of earth materials and how they interact with structures. Understanding the properties of soil and rock beneath the surface is essential for designing safe and stable structures that can withstand various loads and environmental conditions. Without proper knowledge of geotechnical engineering, civil engineers would not be able to ensure the safety and longevity of their projects.
This document outlines a soil mechanics course that covers key topics including soil composition, structure, and classification; stress and permeability in soils; consolidation and settlement; and shear strength. The course aims to provide students with a basic understanding of these topics through examples, problems, and assignments assessed in exams. Students will learn about index properties, compaction, effective stress principles, seepage, consolidation theory, and the Mohr-Coulomb failure criterion to analyze soils. Assessment includes assignments, midterm exams, and a final exam.
This document provides information on an Engineering Geology course, including the course title, code, credit hours, instructors, and outline. The course aims to increase students' knowledge of engineering applications of geology. Key learning outcomes include understanding the impacts of geological processes and features on engineering foundations and preparing engineering geological maps for civil engineering projects. The course outline covers topics such as soils, subsurface water, hazardous earth processes, dams, tunnels, and shallow foundations. Assessment includes quizzes, assignments, tests, and a final exam.
This document presents a study that models and optimizes the compressive strength of lateritic concrete. The study used Scheffe's experimental design techniques to create concrete block samples with varying ratios of cement, laterite, and water. Laterite soil was collected from a construction site in Nigeria. Following experimentation and testing of the samples, a second order polynomial model was developed to characterize the relationship between the concrete components and compressive strength. The model was checked using control factors and a software program was created to select optimized mix ratios to achieve desired strength properties. The document provides background on laterization, laterite composition, concrete mix optimization methods, and the importance of compressive strength modeling.
A site investigation involves several stages to thoroughly understand the subsurface soil and groundwater conditions at a construction site. This includes initial site reconnaissance, preliminary exploration such as geophysical testing, detailed exploration through soil sampling and testing, and a final report. The investigation determines soil properties, depth of bedrock, and groundwater levels which allows engineers to properly design foundations and structures, identify geotechnical risks, select appropriate construction materials and methods, and optimize the design to ensure safety and minimize costs. A comprehensive site investigation plays a crucial role in the success of construction projects.
SOIL EXPLORATION AND GEOTECHNICAL DESIGN OF A FOUNDATIONIRJET Journal
This document summarizes a soil exploration and geotechnical design study for the foundation of a proposed multi-story commercial building. It first describes conducting a site investigation that included borehole drilling, soil sampling, and laboratory testing to characterize the soil properties. The results indicated the soil at shallow depths was unsuitable to support the building loads with a shallow foundation. Therefore, a pile foundation was selected, with the design involving calculating the load capacity of piles based on their end bearing into stronger soil or rock layers at depth. The document provides details of the site location, soil conditions, shallow foundation capacity calculations, and pile foundation design methodology.
Importance of geotechnical engineering knowledge to civil engineers.pdfankit482504
Importance of geotechnical engineering knowledge to civil engineers:-
In today\'s environmental challenges due to climatic changes and global increase in population
the knowledge of geotechnical engineering is a boon for the civil engineers.The knowledge helps
engineers in minimizing natural hazards :-
1) By Landslide stabilization.
2) Flood Protection.
3) Avalanche and mud flow protection.
4) Design of earthquake resistant structures etc.
In former centuries drinking water was often contaminated with full of bacterias causing terrible
epidemics like cholera,typhoid,fever etc. causing death of millions of populations.It is the merit
of geotechnical engineering which saved millions of life than medicine by providing the means
of supply of clean drinking water and for proper disposal of liquid and solid waste. The first
public Vienna drinking water system, for instance, was constructed in the year 1870-1873, and it
has been supplying the population with 470 million litres of high quality water per day ever
since.The total length of the pipes from the headwaters region in the mountains to the
reservoirsin Vienna is 3,100 km.
It was through dams, not gold that california became the equivalent of the world\'s seventh
richest country.Dams have turned the arid central valley into an agricultural supermarket to the
world.
Concept of Geotechnical engineering & application in construction
Geotechnical engineering is the branch of civil engineering concerned with the engineering
behavior of earth materials. Geotechnical engineering is important in civil engineering, but also
has applications in military, mining, petroleum and other engineering disciplines that are
concerned with construction occurring on the surface or within the ground. Geotechnical
engineering uses principles of soil mechanics and rock mechanics to investigate subsurface
conditions and materials; determine the relevant physical/mechanical and chemical properties of
these materials; evaluate stability of natural slopes and man-made soil deposits; assess risks
posed by site conditions; design earthworks and structure foundations; and monitor site
conditions, earthwork and foundation construction.
A typical geotechnical engineering project begins with a review of project needs to define the
required material properties. Then follows a site investigation of soil, rock, fault distribution and
bedrock properties on and below an area of interest to determine their engineering properties
including how they will interact with, on or in a proposed construction. Site investigations are
needed to gain an understanding of the area in or on which the engineering will take place.
Investigations can include the assessment of the risk to humans, property and the environment
from natural hazards such as earthquakes, landslides, sinkholes, soil liquefaction, debris flows
and rock falls.
An engineer then determines and designs the type of foundations, earthworks, and/or pavement
sub grades required for t.
This document contains two forewords for the textbook "Geotechnical Engineering: Principles and Practices of Soil Mechanics and Foundation Engineering".
The first foreword praises the textbook for being the most comprehensive text on the subject found, with clear explanations and ample example problems. It believes students and engineers will enjoy using the book.
The second foreword recommends the textbook highly for students and engineers. It covers important topics like soil improvement methods and geotextile applications. Numerous examples illustrate key concepts clearly. The organization and depth of coverage make it a valuable reference.
This document provides an overview of soil mechanics as a discipline of civil engineering. It discusses the development of soil mechanics as a field systematized by Karl Von Terzaghi. The key topics covered include soil classification, compaction, soil-water relationships, stress distribution and settlement, shear strength, and slope stability. The overall objective is to impart knowledge on the physical and engineering behavior of soils, stress transfer in soils, and stability analysis of slopes. Various laboratory and field tests are also introduced to determine important engineering properties of soils.
1. The document discusses subsurface exploration for geotechnical engineering projects. Subsurface exploration involves methods like trial pits, boreholes, and geophysical tests to understand soil conditions below the surface.
2. Proper subsurface exploration is important for foundation design, construction planning, and other aspects of civil engineering projects. The document outlines factors that determine the scope and methods of exploration for different project types.
3. Key methods discussed include trial pits, hand auger and mechanical boreholes, wash boring, and sampling techniques to obtain representative, disturbed and undisturbed soil samples for testing and analysis. Guidelines are provided on spacing, depth and other aspects of effective subsurface exploration.
Application of structural geology to the solution of engineering problemsRkosgaming
This document is an assignment on applying structural geology to engineering problems. It discusses structural geology, including its classification into primary and secondary structures. Approaching structural geology involves field observations, experiments, and modeling. Scale in structural geology ranges from microscopic to macroscopic. Applications of structural geology include engineering geology, where understanding rock structures is important for constructing dams, tunnels, and buildings. Structural geology is also important for economic geology and understanding petroleum and mineral deposits.
Comparative Study of SMRF Structure in the Different Conditions of Soil: A Re...IRJET Journal
This document summarizes and reviews several research papers on the comparative study of Special Moment Resisting Frames (SMRF) and Ordinary Moment Resisting Frames (OMRF) under different soil conditions. Some key findings include:
1) SMRFs perform better than OMRFs in reducing bending moments, member sizes, and base shear. They provide more ductility and are more effective in seismic zones.
2) Soil flexibility can increase the natural period of structures, altering seismic responses. Accounting for soil-structure interaction is important, especially on soft soils.
3) Research has found higher base shear, inter-story shears, and moments in OMRFs compared to SMRFs
This document provides an introduction to soil mechanics. It discusses how soil is classified for different purposes and from an engineering perspective based on plasticity and grain size. Key concepts in soil mechanics include the role of water in soil behavior, stresses in soil masses, consolidation, shear strength, and bearing capacity. The role of soil mechanics is to help civil engineers address a variety of issues related to slope stability, foundation design, retaining walls, and assessing site response to earthquakes. Proper analysis of soil properties is important for safely supporting structures and designing foundations.
This document presents the results of an experimental analysis of a model plane building frame supported by pile groups embedded in sand. Static load tests were performed on a frame without a plinth beam and with conventional and varying thickness plinth beams. Results found that displacements, rotations, shear forces, and moments in the frame were reduced due to soil interaction. Shear force and bending moment values from experiments showed considerable reduction compared to conventional analysis which ignores soil-structure interaction. As the rigidity of the plinth beam decreased, the shear force and bending moment also decreased, emphasizing the need to consider soil-structure interaction and use of less rigid plinth beams in analysis and design of such structures.
This document discusses engineering geology, including its history, applications, and scope. It provides information on 5 group members and 3 topics related to engineering geology. The history section outlines important publications and programs from the 1880s to the 1920s. Applications of engineering geology are described in civil engineering, mining, petroleum engineering, and other disciplines. The scope of engineering geology includes residential/commercial developments, government/military installations, mining works, public works projects, flood control, understanding earth's structure and evolution, and assisting with civil engineering tasks like dam and foundation design.
Similar to Navarro a#1 introduction to foundation engineering_2014-2015 (20)
Navarro a#1 introduction to foundation engineering_2014-2015
1. Technological University of the Philippines
Ayala Blvd. Ermita, Manila
College of Engineering
Department of Civil Engineering
CE 521-5A
Foundation Engineering, Lec.
Assignment No.1
Introduction to Foundation Engineering
Navarro, Brylle Ephraiem Q.
10-205-053
June 24, 2014
Engr. Jesus Ray M. Mansayon
Instructor
2. Define/Discuss/Enumerate/Differentiate the following:
1. Soil Mechanics, Geotechnical Engineering, and Foundation Engineering
SOIL MECHANICS
Soil mechanics is a branch of engineering mechanics that describes the
behaviour of soils. It differs from fluid mechanics and solid mechanics in the sense that
soils consist of a heterogeneous mixture of fluids (usually air and water) and particles
(usually clay, silt, sand, and gravel) but soil may also contain organic solids, liquids, and
gasses and other matter.1234
Along with rock mechanics, soil mechanics provides the
theoretical basis for analysis in geotechnical engineering,5
a sub discipline of Civil
engineering, and engineering geology, a sub discipline of geology. Soil mechanics is
used to analyze the deformations of and flow of fluids within natural and man-made
structures that are supported on or made of soil, or structures that are buried in
soils.6
Example applications are building and bridge foundations, retaining walls, dams,
and buried pipeline systems. Principles of soil mechanics are also used in related
disciplines such as engineering geology, geophysical engineering, coastal
engineering, agricultural engineering, hydrology and soil physics.
GEOTECHNICAL ENGINEERING
Geotechnical engineering is the branch of civil engineering concerned with the
engineering behaviour of earth materials. Geotechnical engineering is important in civil
engineering, but is also used by military, mining, petroleum, or any other engineering
concerned with construction on or in the ground. Geotechnical engineering uses
principles of soil mechanics and rock mechanics to investigate subsurface conditions
and materials; determine the relevant physical/mechanical and chemical properties of
these materials; evaluate stability of natural slopes and man-made soil deposits; assess
1
Mitchell, J.K., and Soga, K. (2005) Fundamentals of soil behavior, Third edition, John Wiley and Sons, Inc., ISBN 978-0-471-46302-7.
2
Santamarina, J.C., Klein, K.A., & Fam, M.A. (2001). Soils and Waves: Particulate Materials Behavior, Characterization and Process
Monitoring. Wiley. ISBN 978-0-471-49058-6..
3
Powrie, W., Spon Press, 2004, Soil Mechanics - 2nd ed ISBN 0-415-31156-X
4
A Guide to Soil Mechanics, Bolton, Malcolm,Macmillan Press, 1979. ISBN 0-333-18932-0
5
Fang, Y., Spon Press, 2006, Introductory Geotechnical Engineering
6
Lambe, T. William & Robert V. Whitman. Soil Mechanics. Wiley, 1991; p. 29. ISBN 978-0-471-51192-2
3. risks posed by site conditions; design earthworks and structure foundations; and
monitor site conditions, earthwork and foundation construction.78
FOUNDATION ENGINEERING
Foundation Engineering is the engineering field of study devoted to the design
of those structures which support other structures, most typically buildings, bridges or
transportation infrastructure. It is at the periphery of Civil, Structural and Geotechnical
Engineering disciplines and has distinct focus on soil-structure interaction.
2. Foundation Engineer
The title Foundation Engineer is given to the person who by reason of training
and experience is sufficiently versed in scientific principles and engineering judgment to
design a foundation.
The necessary scientific principles are acquired through formal educational
courses in geo-technical (soil mechanics, geology, foundation engineering) and
structural (analysis, design in reinforced concrete and steel, etc.) engineering and
continued self-study via short-courses, professional conferences, journal reading, and
the like.
Because of the heterogeneous nature of soil and rock masses, two foundations- even
on adjacent construction sites- will seldom be the same except by coincidence. Since
every foundation represents at least partly a venture into the unknown, it is of great
value to have access to other’s solutions obtained from conference presentations,
journal papers, and textbook condensations of appropriate literature. The amalgamation
of experience, study of what others have done in somewhat similar situations, and the
site-specific geotechnical information to produce an economical, practical, and safe
substructure design is application of engineering judgment.
The following steps are the minimum required for designing a foundation:
7
Terzaghi, K., Peck, R.B. and Mesri, G. (1996), Soil Mechanics in Engineering Practice 3rd Ed., John Wiley & Sons, Inc. ISBN 0-471-08658-
4
8
Holtz, R. and Kovacs, W. (1981), An Introduction to Geotechnical Engineering, Prentice-Hall, Inc. ISBN 0-13-484394-0
4. 1. Locate the site and the position of load. A rough estimate of the foundation
load(s) is usually provided by the client or made in-house. Depending on the site
or load system complexity, a literature survey may be started to see how others
have approached similar problems.
2. Physically inspect the site for any geological or other evidence that may
indicate a potential design problem that will have to be taken into account when
making the design or giving a design recommendation. Supplement this
inspection with any previously obtained soil data.
3. Establish the field exploration program and, on the basis of discovery (or what
is found in the initial phase), set up the necessary supplemental field testing and
any laboratory test program.
4. Determine the necessary soil design parameters based on integration of test
data, scientific principles, and engineering judgment. Simple or complex
computer analyses may be involved. For complex problems, compare the
recommended data with published literature or engage another geotechnical
consultant to give an outside perspective to the results.
5. Design the foundation using the soil parameters from step 4. The foundation
should be economical and be able to be built by the available construction
personnel. Take into account practical construction tolerances and local
construction practices. Interact closely with all concerned (client, engineers,
architect, contractor) so that the substructure system is not excessively
overdesigned and risk is kept within acceptable levels. A computer may be used
extensively (or not at all) in this step.
The foundation engineer should be experienced in and have participation in all
five of the preceding steps. In practice this often is not the case. An independent
geotechnical firm specializing in sol exploration, soil testing, design of landfills,
embankments, water pollution control, etc. often assigns one of its geotechnical
designers to do steps 1 through 4.
5. The output of step 4 is given to the client- often a foundation engineer who
specializes in the design of the structural elements making up the substructure system.
The principal deficiency in this approach is the tendency to treat the design soil
parameters- obtained from soil tests of variable quality, heavily supplemented with
engineering judgment- as precise numbers whose magnitude is totally inviolable. Thus,
the foundation engineer and geotechnical consultant must work closely together, or at
least have frequent conferences as the design progresses. It should be evident that
both parties need to appreciate the problems of each other and, particularly, that the
foundation design engineer must be aware of the approximate methods used to obtain
the soil parameters being used. This understanding can be obtained by each having
training in the other’s specialty.
To this end, the primary focus of this text will be on analysis and design of the
interfacing elements for buildings, machines, and retaining structures and on those soil
mechanics principles used to obtain the necessary soil parameters required to
accomplish the design. Specific foundation elements to be considered include shallow
elements such as footings and mats and deep elements such as piles and drilled piers.
Geotechnical considerations will primarily be on strength and deformation and those
soil-water phenomena that affect strength and deformation with the current trend to
using sites with marginal soil parameters for major projects, methods to improve the
strength and deformation characteristics through soil improvement methods.9
3. Four Performance Requirements
STRENGTH REQUIREMENTS
Strength requirements are intended to avoid catastrophic failures. There are
two types: geotechnical strength requirements and structural strength requirements.
Geotechnical strength requirements are those that address the ability of the
soil or rock to accept the loads imparted by the foundation without failing. The strength
of soil is governed by its capacity to sustain shear stresses, so we satisfy geotechnical
9
Bowles, Joseph. 1995. Foundation Analysis and Design., 5th Edition., USA. P24-26
6. strength requirements by comparing shear stresses with shear strengths and designing
accordingly.
In the case of spread footing foundations, geotechnical strength is expressed as
the bearing capacity of the soil. If the load-bearing capacity of the soil is exceeded, the
resulting shear failure is called a bearing capacity failure as shown in the Figure 1.
Structural strength requirements address the foundation’s structural integrity
and its ability to safely carry the applied loads. Foundations that are loaded beyond
structural capacity will, in principle, fail catastrophically.
Structural strength analyses are conducted using the ASD or LRFD methods,
depending on the types of foundation, the structural materials, and the governing code.
SERVICEABILITY REQUIREMENTS
Serviceability requirements are intended to produce foundations that perform
well when subjected to the service loads. These requirements include:
Settlement – Most foundations experience some downward movement as
a result of the applied loads. This movement is called settlement. Keeping
settlements within tolerable limits is usually the most important foundation
serviceability requirement.
Fig.1. A bearing capacity
failure beneath a spread
footing foundation. The soil
has failed in shear, causing
the foundation to collapse
7. Heave – Sometimes foundations move upward instead of downward. We
call this upward movement heave. The most common source of heave is
the swelling of expansive soils.
Tilt – When settlement or heave occurs only on one side of the structure,
it may begin to tilt. The Leaning Tower of Pisa is an extreme example of
tilt.
Lateral movement – Foundations subjected to lateral loads (shear or
moment) deform horizontally. This lateral movement also must remain
within acceptable limits to avoid structural distress.
Vibration – Some foundations, such as those supporting certain kinds of
heavy machinery, are subjected to strong vibrations. Such foundations
need to accommodate these vibrations without experiencing resonance or
other problems.
Durability – Foundations must be resistant to the various physical,
chemical, and biological processes that cause deterioration. This is
especially important in waterfront structures, such as docks and piers.
Failure to satisfy these requirements generally results in increased maintenance
costs, aesthetic problems, diminished usefulness of the structure, and other similar
effects.
Fig.2. Modes of settlement: (a)
uniform, (b) tilting with no
distortion, (c) distortion
8. CONSTRUCTIBILITY REQUIREMENTS
Constructibility requirements meaning the foundation must be designed such
that the contractor can build it without having to use extraordinary method or equipment.
ECONOMIC REQUIREMENTS
Economic requirements are intended to produce designs that minimize the
required quantity of construction materials do not necessarily minimize the cost. In
some cases, designs that use more materials may be easier to build, and thus have a
lower overall cost.10
4. Classification of Foundation
The various types of structural foundations may be grouped into two broad
categories — shallow foundations and deep foundations. The classification indicates the
depth of the foundation relative to its size and the depth of the soil providing most of the
support. According to Terzaghi, a foundation is shallow if its depth is equal to or less
than its width and deep when it exceeds the width.
Further classification of shallow foundations and deep foundations is as follows:
10
http://infohost.nmt.edu/~Mehrdad/foundation/hdout/PerformanceRequirements.pdf
9. The ‘floating foundation’, a special category, is not actually a different type, but it
represents a special application of a soil mechanics principle to a combination of raft-
caisson foundation, explained later.
A short description of these with pictorial representation will now be given.
Spread footings
Spread footing foundation is basically a pad used to ‘‘spread out’’ loads from
walls or columns over a sufficiently large area of foundation soil. These are constructed
as close to the ground surface as possible consistent with the design requirements, and
with factors such as frost penetration depth and possibility of soil erosion. Footings for
permanent structures are rarely located directly on the ground surface. A spread footing
need not necessarily be at small depths; it may be located deep in the ground if the soil
conditions or design criteria require.
Spread footing required to support a wall is known as a continuous, wall, or strip
footing, while that required to support a column is known as an individual or an isolated
footing.
An isolated footing may be square, circular, or rectangular in shape in plan,
depending upon factors such as the plan shape of the column and constraints of space.
10. If the footing supports more than one column or wall, it will be a strap footing,
combined footing or a raft foundation.
The common types of spread footings referred to above are shown in Fig. 15.2.
Two miscellaneous types—the monolithic footing, used for watertight basement (also for
resisting uplift), and the grillage foundation, used for heavy loads are also shown.
Strap footings
A ‘strap footing’ comprises two or more footings connected by a beam called ‘strap’.
This is also called a ‘cantilever footing’ or ‘pump-handle foundation’. This may be
required when the footing of an exterior column cannot extend into an adjoining private
property. Common types of strap beam arrangements are shown in Fig. 15.3.
Combined footings
A combined footing supports two or more columns in a row when the areas required for
individual footings are such that they come very near each other. They are also
preferred in situations of limited space on one side owing to the existence of the
boundary line of private property.
11. The plan shape of the footing may be rectangular or trapezoidal; the footing will then be
called ‘rectangular combined footing’ or ‘trapezoidal combined footing’, as the case may
be. These are shown in Fig. 15.4.
Raft foundations (Mats)
A raft or mat foundation is a large footing, usually supporting walls as well as
several columns in two or more rows. This is adopted when individual column footings
would tend to be too close or tend to overlap; further, this is considered suitable when
differential settlements arising out of footings on weak soils are to be minimised. A
typical mat or raft is shown in Fig. 15.5.
12. Deep footings
According to Terzaghi, if the depth of a footing is less
than or equal to the width, it may be considered a shallow
foundation. Theories of bearing capacity have been considered
13. for these in Chapter 14. However, if the depth is more, the footings are considered as
deep footings (Fig.15.6); Meyerhof (1951) developed the theory of bearing capacity for
such footings.
Pile foundations
Pile foundations are intended to transmit structural
loads through zones of poor soil to a depth where the soil
has the desired capacity to transmit the loads. They are
somewhat similar to columns in that loads developed at
one level are transmitted to a lower level; but piles obtain
lateral support from the soil in which they are embedded
so that there is no concern with regard to buckling and, it
is in this respect that they differ from columns. Piles are slender foundation units which
are usually driven into place. They may also be cast-in-place (Fig. 15.7).
A pile foundation usually consists of a number of piles, which together support a
structure. The piles may be driven or placed vertically or with a batter.
Pier foundations
Pier foundations are somewhat similar to pile foundations
but are typically larger in area than piles. An opening is
drilled to the desired depth and concrete is poured to make
a pier foundation (Fig. 15.8). Much distinction is now being
lost between the pile foundation and pier foundation,
adjectives such as ‘driven’, ‘bored’, or ‘drilled’, and ‘precast’
and ‘cast-in-situ’, being used to indicate the method of
installation and construction. Usually, pier foundations are
used for bridges.
Caissons (Wells)
A caisson is a structural box or chamber that is sunk into place or built in place
by systematic excavation below the bottom. Caissons are classified as ‘open’ caissons,
14. ‘pneumatic’ caissons, and ‘box’ or ‘floating’ caissons. Open caissons may be box-type
of pile-type.
The top and bottom are open during installation for open caissons. The bottom
may be finally sealed with concrete or may be anchored into rock.
Pneumatic caisson is one in which compressed air is used to keep water from
entering the working chamber, the top of the caisson is closed. Excavation and
concreting is facilitated to be carried out in the dry. The caisson is sunk deeper as the
excavation proceeds and on reaching the final position, the working chamber is filled
with concrete.
Box or floating caisson is one in which the bottom is closed. It is cast on land and
towed to the site and launched in water, after the concrete has got cured. It is sunk into
position by filling the inside with sand, gravel, concrete or water. False bottoms or
temporary bases of timber are sometimes used for floating the caisson to the site. The
various types of caissons are shown in Fig. 15.9
15. Floating foundation
The floating foundation is a special type of foundation construction useful in
locations where deep deposits of compressible cohesive soils exist and the use of piles
is impractical. The concept of a floating foundation requires that the substructure be
assembled as a combination of a raft and caisson to create a rigid box as shown in Fig.
15.10.
This foundation is installed at such a depth that the total weight of the soil
excavated for the rigid box equals the total weight of the planned structure. Theoretically
speaking, therefore, the soil below the structure is not subjected to any increase in
stress; consequently, no settlement is to be expected. However, some settlement does
occur usually because the soil at the bottom of the excavation expands after excavation
and gets recompressed during and after construction.11
11
Venkatramaiah, C. 2006. Geotechnical Engineering, Revised 3rd
Edition. New Age International (P) Limited Publishers. P607-613.