The document discusses foundations for buildings. It describes shallow foundations, which transfer loads directly to soil near the surface, and deep foundations, which transfer loads to deeper, stronger soils using piles. Shallow foundations include spread footings, which distribute loads over a large area under columns and walls, and raft/mat foundations, which use a reinforced concrete slab to spread loads across an entire building site. Deep foundations use piles that extend through weak surface soils to stronger soils below, and include precast concrete or steel piles driven into the ground or cast-in-place bored piles. The type of foundation used depends on the building loads and the bearing capacity of subsurface soils and rocks.
Types of dams, geological considerations in site selection, Competency of Rocks to offer stable dam foundation, effect of geological structures on dam, selection of dam site, Reservoir, purpose of reservoir, influence of water table, geological structures, life of reservoir, geophysical studies
Types of dams, geological considerations in site selection, Competency of Rocks to offer stable dam foundation, effect of geological structures on dam, selection of dam site, Reservoir, purpose of reservoir, influence of water table, geological structures, life of reservoir, geophysical studies
Seismic Refraction Test
Subsurface investigation by seismic refraction
Seismic Data Analysis
Seismic refraction instrumental set up and operation
P-waves velocity ranges for different strata
Rocks are used in various purpose like building material, in foundation, as railway ballast,in dam etc. That's why careful studies bring out the inherent advantage and disadvantage of a site and such studies go a long way either in reducing or in increasing the cost of the structure.
Highway engineering is an engineering discipline branching out from civil engineering. This subject involves the planning, design, construction, operation, and maintenance of roads, bridges, and tunnels to ensure safe and effective transportation of people and goods. There are certain geological conditions which should be considered while laying the highways. This module give those details in general.
Seismic Refraction Test
Subsurface investigation by seismic refraction
Seismic Data Analysis
Seismic refraction instrumental set up and operation
P-waves velocity ranges for different strata
Rocks are used in various purpose like building material, in foundation, as railway ballast,in dam etc. That's why careful studies bring out the inherent advantage and disadvantage of a site and such studies go a long way either in reducing or in increasing the cost of the structure.
Highway engineering is an engineering discipline branching out from civil engineering. This subject involves the planning, design, construction, operation, and maintenance of roads, bridges, and tunnels to ensure safe and effective transportation of people and goods. There are certain geological conditions which should be considered while laying the highways. This module give those details in general.
Foundation plays an important role in the Construction work. To build a strong building, we need to have a strong base and for increasing the life of the structure, it's necessary to have a strong foundation.
house foundation types
foundation types for building
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types of building foundations pdf
commercial building foundation types
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types of foundations in construction
types of house foundations
how to build a foundation
About foundation and its Types
1. Foundation, Part of a structural system that supports and anchors the superstructure of a building and transmits its loads directly to the earth.
2. To prevent damage from repeated freeze-thaw cycles, the bottom of the foundation must be below the frost line.
3. The foundations of low-rise residential buildings are nearly all supported on spread footings, wide bases (usually of concrete) that support walls or piers and distribute the load over a greater area.
4. A concrete grade beam supported by isolated footings, piers, or piles may be placed at ground level, especially in a building without a basement, to support the exterior wall.
Foundation Module 3rd-BCT301.pdf
Building Construction Technology Course and Equipment
Lecturer’s name: Saad Talaat BILBAS
University: Erbil Polytechnic University
College: Engineering
Department: Civil
Delivering Micro-Credentials in Technical and Vocational Education and TrainingAG2 Design
Explore how micro-credentials are transforming Technical and Vocational Education and Training (TVET) with this comprehensive slide deck. Discover what micro-credentials are, their importance in TVET, the advantages they offer, and the insights from industry experts. Additionally, learn about the top software applications available for creating and managing micro-credentials. This presentation also includes valuable resources and a discussion on the future of these specialised certifications.
For more detailed information on delivering micro-credentials in TVET, visit this https://tvettrainer.com/delivering-micro-credentials-in-tvet/
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Normal Labour/ Stages of Labour/ Mechanism of LabourWasim Ak
Normal labor is also termed spontaneous labor, defined as the natural physiological process through which the fetus, placenta, and membranes are expelled from the uterus through the birth canal at term (37 to 42 weeks
it describes the bony anatomy including the femoral head , acetabulum, labrum . also discusses the capsule , ligaments . muscle that act on the hip joint and the range of motion are outlined. factors affecting hip joint stability and weight transmission through the joint are summarized.
A review of the growth of the Israel Genealogy Research Association Database Collection for the last 12 months. Our collection is now passed the 3 million mark and still growing. See which archives have contributed the most. See the different types of records we have, and which years have had records added. You can also see what we have for the future.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
A Strategic Approach: GenAI in EducationPeter Windle
Artificial Intelligence (AI) technologies such as Generative AI, Image Generators and Large Language Models have had a dramatic impact on teaching, learning and assessment over the past 18 months. The most immediate threat AI posed was to Academic Integrity with Higher Education Institutes (HEIs) focusing their efforts on combating the use of GenAI in assessment. Guidelines were developed for staff and students, policies put in place too. Innovative educators have forged paths in the use of Generative AI for teaching, learning and assessments leading to pockets of transformation springing up across HEIs, often with little or no top-down guidance, support or direction.
This Gasta posits a strategic approach to integrating AI into HEIs to prepare staff, students and the curriculum for an evolving world and workplace. We will highlight the advantages of working with these technologies beyond the realm of teaching, learning and assessment by considering prompt engineering skills, industry impact, curriculum changes, and the need for staff upskilling. In contrast, not engaging strategically with Generative AI poses risks, including falling behind peers, missed opportunities and failing to ensure our graduates remain employable. The rapid evolution of AI technologies necessitates a proactive and strategic approach if we are to remain relevant.
3. Introduction
■ “The foundation of a building is that part of walls, piers and columns in direct
contact with the ground and transmitting loads to the ground.”
■ Every building needs a foundation of some kind.
■ Because of the variety of soil, rock, and water conditions that are encountered
below the surface of the ground and the unique demands that buildings make
upon their foundations, foundation design is a highly specialized field
combining aspects of geotechnical and civil engineering.
R. R. Gadgil, Dept. of Earth Science, Goa University 3
4. Purpose of foundation
■ To distribute the load of the structure over a large bearing area so as to bring the
intensity of load within the safe bearing capacity of soil.
■ To load the bearing surface at a uniform rate to avoid differential settlement.
■ To prevent the lateral movement of supporting material.
■ To attain a level and firm bed for building operations.
■ To increase the stability of the structure as a whole.
R. R. Gadgil, Dept. of Earth Science, Goa University 4
5. General Considerations
■ The exploratory program for the foundation of a building essentially depends on 2 factors:
1. The weight of the building and other forces acting on it and
2. The service of the building or the purpose for which it is being built.
As to the service of the building, there are four categories, namely,
1. Residential buildings including housing projects
2. Commercial buildings
3. Industrial buildings
4. Pumping and power plants.
Monuments and palaces do not fall into any category.
R. R. Gadgil, Dept. of Earth Science, Goa University 5
6. Structural Loads
■ The weight of the building itself including its appurtenances is the Dead load (DL).
■ The weight of the loads applied to the building intermittently is the live load (LL).
■ For rough computations, the live load is sometimes estimated at 50% of the dead
load.
■ Generally the dead and the live loads are transmitted to the foundations vertically.
■ Such is the case when all the loads are taken up by the walls and columns and then
passed to the footings.
■ Roofs over large halls, such as auditoriums or mess halls are sometimes designed in
the form of arches.
R. R. Gadgil, Dept. of Earth Science, Goa University 6
7. Structural Loads
■ Besides dead and live loads, there are lateral forces acting on the building.
■ These are mainly wind and earthquake forces which act laterally and tend to
push the building sideways, where they must be resisted by the shearing
strength of the materials in which the foundations are built and the passive
resistance of the soil mass supporting the building.
■ The resultant of vertical and lateral forces at the foundation generates two
types of stresses- compressive and shear, the former causing reduction in
volume of the material and consequent settlement leading to deformation,
while the latter tends to slide the base of the foundation over the
underlying material.
■ Other forces acting on some buildings are vibrations.
■ These are particularly evident in power and pumping plants or in industrial
buildings containing large machines.
R. R. Gadgil, Dept. of Earth Science, Goa University 7
8. Types of foundation
■ There are two basic types of foundations
1. Shallow foundation
2. Deep foundation
■ Shallow foundation
– The foundation provided immediately below the lowest part of the structure
near the ground level, transferring load directly to the supporting soil, is
known as shallow foundation.
– Shallow foundation is provided when stable soil with adequate bearing
capacity occur near to the ground level.
– Requirements
Suitable soil bearing capacity
Undisturbed soil or engineered fill
R. R. Gadgil, Dept. of Earth Science, Goa University 8
9. 1) Types of Shallow foundation
a) Spread footing or open trench foundation
b) Raft/mat foundation
c)Rubble trench foundation
R. R. Gadgil, Dept. of Earth Science, Goa University 9
10. Footing
■ Footings distribute the load to the subsoil over an area sufficient to suit the
pressures to the properties of the soil or rock.
■ Their size is therefore governed by the strength of the foundation
materials.
■ If the footing supports a single column it is known as a spread or pad
footing whereas a footing beneath a wall is referred to as a strip or
continuous footing.
■ Settlement of a footing due to a given load per unit area of its base, is a
complex function of the dimensions of the base and of the compressibility,
permeability and Poisson's number of the foundation materials located
between the base and a depth which is at least equal to three times the
width of the base.R. R. Gadgil, Dept. of Earth Science, Goa University 10
11. Spread footing
■ A spread footing foundation, which is typical in residential
building, has a wider bottom portion than the load-bearing
foundation walls it supports. This wider part "spreads" the
weight of the structure over more area for greater stability.
■ The design and layout of spread footings is controlled by several
factors, foremost of which is the weight (load) of the structure it will
support.
■ These foundations are common in residential construction that
includes a basement, and in many commercial structures. But for high
rise buildings they are not sufficient.
R. R. Gadgil, Dept. of Earth Science, Goa University 11
12. Spread footing in stone masonry
R. R. Gadgil, Dept. of Earth Science, Goa University 12
14. Spread footing
■ There are 3 basic types of spread footings
1. Individual footings: Generally supporting a column (either an outside wall
column or an interior column)
2. Continuous or wall footings
3. The mat or raft foundations
R. R. Gadgil, Dept. of Earth Science, Goa University 14
15. Spread footing
■ Individual footings may be an one of 3 varieties
1. Shallow slab type
2. Battered type
3. Stepped type
R. R. Gadgil, Dept. of Earth Science, Goa University 15
16. Continuous footing
■ It is merely a wall with a
widened base resting on the
subsurface material.
■ This type is used preferably
for light buildings such as
residences, one-story school
buildings or small, one-story
warehouses.
R. R. Gadgil, Dept. of Earth Science, Goa University 16
18. Isolated stepped type footing
R. R. Gadgil, Dept. of Earth Science, Goa University 18
19. Raft/mat/slab foundation
■ Raft foundation is a thick concrete slab reinforced with steel which
covers the entire contact area of the structure like a thick floor.
■ The reinforcing bars runs normal to each other in both top and bottom
layers of steel reinforcement.
■ Sometimes inverted main beams and secondary beams are used to
carry column loads that require thicker foundation slab considering
economy of the structure.
■ Used generally for higher loads and prevention of excessive
settlements.
R. R. Gadgil, Dept. of Earth Science, Goa University 19
21. Raft/mat/slab foundation
■ The chief function of a raft is to spread the building load over as great an area of
ground as possible and thus reduce the bearing pressure to a minimum.
■ In addition a raft provides a degree of rigidity which reduces differential
movements in the superstructure.
■ The settlement of a raft foundation does not depend on the weight of the building
which is supported by the raft.
■ It depends only on the difference between this weight and the weight of the soil
which is removed prior to the construction of the raft.
■ A raft can be built at a sufficient depth so that the weight of soil removed equals
the weight of the building.
■ Hence such rafts are sometimes called floating or semi-floating foundations.
■ The success of this type of foundation structure in overcoming difficult soil
conditions has led to the use of deep raft and rigid frame basements for a number
of high buildings on clay.
R. R. Gadgil, Dept. of Earth Science, Goa University 21
23. Deep Foundations
■ When the superficial layers of the ground are not sound
enough or are highly compressible, shallow foundations may
not guarantee either an adequate factor of safety or settlement
within the allowable values for the structure.
■ In special circumstances, where differential settlements have to
be strictly delimited, shallow foundations may not be
appropriate solution.
■ Here the loads have to be supported by transferring them to a
deeper soil or rock with a higher bearing capacity.
■ Hence, pile foundations have to be used.
R. R. Gadgil, Dept. of Earth Science, Goa University 23
24. Deep Foundations -
Purpose
transfer building loads deep into the earth
Basic types
– Drilled (& poured)
– Driven
R. R. Gadgil, Dept. of Earth Science, Goa University 24
25. R. R. Gadgil, Dept. of Earth Science, Goa University 25
26. Piles
■ A pile is basically a structural foundation component
where length is its maximum dimension.
■ A deep foundation is normally considered to be a pile
when its total length is equal to or greater than eight
times its width or minimum dimension.
■ They can be classified into 2 basic groups
1. Precast driven piles
2. Cast-in-situ bored piles
R. R. Gadgil, Dept. of Earth Science, Goa University 26
28. Precast Piles & Bored Piles
■ These are straight pieces of timber, reinforced concrete or steel which are
driven into the ground by blows or vibrations until they reach the required
depth.
■ They are also known as displacement piles, because of this method of
installation, since when they are driven into the ground they displace the
soil occupying that place.
■ Bored piles are sunk by boring holes of the required depth and diameter.
■ A steel cage of reinforcement is installed as required and then the hole is
filled with concrete.
■ As a volume of soil has to be excavated and removed to construct the
piles they are also known as substitution piles.
R. R. Gadgil, Dept. of Earth Science, Goa University 28
30. Single Piles
A column is not normally supported by a single
pile, and in fact this system should not be used
except in the case of a large-diameter column with
a high bearing capacity.
R. R. Gadgil, Dept. of Earth Science, Goa University 30
31. Column or End-bearing
pile
In this type of pile all or most of the
load received at the top is transmitted
integrally to the tip, with only a small
part of the load transmitted by shaft
(along its sides).
An example of this would be a pile
driven into very soft soil with the tip
resting on very hard, competent ground.
R. R. Gadgil, Dept. of Earth Science, Goa University 31
32. Friction pile
On the other hand, in this type of pile,
most of the load is transmitted to the
ground through the skin friction of the
shaft.
In this case, the load reaching the tip
may be smaller than that transmitted
along the length of the pile shaft.
Normal situations fall somewhere
between the two…..
R. R. Gadgil, Dept. of Earth Science, Goa University 32
33. Caissons or Piers
A drilled-in pier or caisson is a variation
of individual footing.
Such piers vary in diameter from 6” to
6’ and more, the most common sizes
being 24 and 36”.
The hole for the pier is usually drilled
with special machines and after the
excavation is made, the hole is filled
with concrete and sometimes reinforced
with vertical steel bars.
R. R. Gadgil, Dept. of Earth Science, Goa University 33
34. Caissons or Piers
If it is necessary to spread the load
carried by the pier over wider area then
the actual drilled diameter of the pier,
the bottom of the hole is “underrimmed”
or “belled” i.e. the lower end is enlarged
into a cone or bell-like design.
R. R. Gadgil, Dept. of Earth Science, Goa University 34
35. Caissons or Piers
(i) concrete caisson with
enlarged bottom (b), (ii)
caisson of steel pipe with
concrete filled in the pipe (c)
and (iii) caisson with concrete
and steel core in steel pipe (d).
R. R. Gadgil, Dept. of Earth Science, Goa University 35
36. Concrete piles
Concrete piles may be precast or cast-in-place.
Precast piles are generally octagonal or square in cross
section and are reinforced with steel bars.
For cast-in-place piles, a thin steel shell with a steel
core inside is driven into the ground, after which the
steel core is removed and the shell is filled with
concrete.
R. R. Gadgil, Dept. of Earth Science, Goa University 36
37. Steel piles
They are of 2 types: Concrete filled steel pipes (tubes) and steel H
piles.
Open end heavy steel tubes upto 30 in. in diameter are driven
through soft deposits to rock, the material inside the tube is
washed out with water or compressed air jet, then the tube is
redriven to final position and filled with concrete.
The H piles, have all 3 components of the letter H equal.
These piles, like the steel tubes, are used to carry the weight
of the building to deeper, more reliable strata.
R. R. Gadgil, Dept. of Earth Science, Goa University 37
39. R. R. Gadgil, Dept. of Earth Science, Goa University 39
40. Site Cast Concrete Piles
Cased Piles Uncased Piles
R. R. Gadgil, Dept. of Earth Science, Goa University 40
41. Negative Friction (drag)
When a fill or load is placed on
compressible soil deposit, consolidation
of the compressible material takes
place, earthquake liquefaction or
groundwater extraction.
The downward movement of soil
develops skin friction between the pile
and the surrounding soil and it is termed
as negative skin friction.
Negative skin friction can be developed
from lowering on water level in
compressible soils such as clay, peat, mud
and soft soil and also due to increase in
stress by some means (e.g. filling).
R. R. Gadgil, Dept. of Earth Science, Goa University 41
Editor's Notes
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg464
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg464
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg465
Picture from Geological Engineering
Engineering Geology and Geotechnics by Bell pg241
When a material is compressed in one direction, it usually tends to expand in other two directions perpendicular to the direction of compression. This phenomena is called Poisson’s effect. Poisson’s ratio is a measure of this effect.
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg466
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg466
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg466
Principles of Engineering Geology and Geotechnics by Krynine and Judd pg466
Internet
Internet
Engineering Geology and Geotechnics by Bell pg242
Engineering Geology and Geotechnics by Bell pg242
Geological Engineering pg385
Geological Engineering pg385
Internet
Geological Engineering pg386
Geological Engineering pg387
Geological Engineering pg387
Principles of Engineering Geology and Geotechnics pg468-69
Principles of Engineering Geology and Geotechnics pg468-69
Geological Engineering pg387
Principles of Engineering Geology and Geotechnics pg470
Principles of Engineering Geology and Geotechnics pg471
http://theconstructor.org/geotechnical/negative-skin-friction-on-piles/3376/
Picture from Practical Engineering Geology by Steve Hencher pg250