This document summarizes key concepts related to building construction formwork, scaffolding, and shoring. It defines formwork as artificial supports provided below and around concrete work, noting that formwork can be made of steel or wood. Factors that affect the cost of formwork include material, erection, removal, and labor costs. Formwork is needed for foundations, walls, columns, slabs, beams, and stairs. Scaffolding provides a temporary work platform at different building levels, and can be single, double, ladder, cantilever, suspended, or steel/tubular. Shoring provides temporary support to unsafe structures and can be horizontal, vertical, or inclined. Sketches of column formwork, double
This document discusses different types of foundations, focusing on pile foundations. It defines foundations and classifies them as either shallow or deep. Pile foundations are described as deep foundations that transfer loads to deeper, stronger soils using piles. The main types of piles - displacement, replacement, and installation techniques - are outlined. Specific pile types are then detailed, including pre-cast concrete, pre-stressed concrete spun, steel H, bored, and wood piles. The document concludes by describing end bearing piles, friction piles, settlement reducing piles, and piles in fill.
California bearing ratio test (CBR TEST)Ujas Patel
The California Bearing Ratio (CBR) test is used to determine the bearing capacity of soil subgrades and base course materials. The test involves measuring the penetration of a piston into a remolded soil sample under increasing loads. Loads are applied to penetrate the soil at 1.25 mm/min up to 12.5 mm. The CBR value is calculated by dividing the load measured from the soil sample at a given penetration by the standard load value for that penetration from a reference material with a CBR of 100%. Higher CBR values indicate soils with greater bearing capacity for supporting structures.
The main components of an earth dam are as follows :
1. Impervious core
2. Pervious shell
3. Filter
4. Rock toe
5. U/S slope protection
6. D/S slope protection
7. Cutoff
core shouldnot be less than 3 m and its height should be 1 m more than the maximum water levelin the reservoir.
The upstream pervious zone provides free drainage during sudden drawdown. ,
Usually following types of filters are provided :
(1) Toe filter
(2) Horizontal drainage filter (blanket)
(3) Chimney drains
Such a filter is sometimes known as inverted filter or reverse filter.
Rock toe keeps the phreatic line well within the section and also facilitates drainage.
The following measures are taken to protect the slope.
(1) Rock riprap
(2) Concrete pavement
(3) Steel facing
(4) Bituminous pavement
(5) Precast concrete blocks
Cut off is required to
(1) reduce loss of stored water through foundation and abutments
(2) Prevent sub surface erosion by piping.
Cutoff may be provided in the following ways :
• by providing concrete cutoff wall
• by providing cutoff trench filled with impervious material
• by driving sheet pile
• by curtain grouting
Dynamic pile formulae estimate the ultimate load capacity of driven piles based on data collected during pile driving. The Engineering News formula is the simplest and most used dynamic formula. It relates the ultimate load capacity to the weight of the hammer, height of fall, and pile penetration per blow. The Modified Hiley's formula improves upon the Engineering News formula by accounting for energy losses during driving. Limitations of dynamic formulae include not representing the static load capacity and being unsuitable for cohesive soils where pore pressures can develop.
The document provides an introduction to soil mechanics and soil types. It defines soil mechanics as the branch of engineering that deals with the properties and behavior of soil. It discusses the different types of soils based on their geological origin such as glacial soil, residual soil, alluvial soil, and aeolian soil. It also classifies soils based on engineering properties such as clay, silt, sand, gravel, cobbles, and boulders. The key factors that influence the engineering behavior of soils like particle size, shape, mineral composition are also highlighted.
Earthquakes effects on reinforced concrete buildingsAnoop Shrestha
Reinforced concrete buildings have become common in Nepal, particularly in urban areas. They consist of concrete reinforced with steel bars. During earthquakes, inertia forces develop at each floor level and accumulate downwards, resulting in higher forces at lower stories. Floor slabs are rigid elements that bend with beams but keep columns at the same level moving together. Masonry infill walls between columns and slabs resist horizontal movement but can crack under severe shaking. Proper design requires reinforcement on all faces of beams and columns to resist bending moment reversals from earthquakes. Columns must be stronger than beams, and foundations stronger than columns, to ensure the building can deform without collapse.
dewatering in different soil conditions, methods, explanation of dewatering methods, : open sumps & ditches, vaccumm method deppwell point method electro osmosis metheod
This document summarizes key concepts related to building construction formwork, scaffolding, and shoring. It defines formwork as artificial supports provided below and around concrete work, noting that formwork can be made of steel or wood. Factors that affect the cost of formwork include material, erection, removal, and labor costs. Formwork is needed for foundations, walls, columns, slabs, beams, and stairs. Scaffolding provides a temporary work platform at different building levels, and can be single, double, ladder, cantilever, suspended, or steel/tubular. Shoring provides temporary support to unsafe structures and can be horizontal, vertical, or inclined. Sketches of column formwork, double
This document discusses different types of foundations, focusing on pile foundations. It defines foundations and classifies them as either shallow or deep. Pile foundations are described as deep foundations that transfer loads to deeper, stronger soils using piles. The main types of piles - displacement, replacement, and installation techniques - are outlined. Specific pile types are then detailed, including pre-cast concrete, pre-stressed concrete spun, steel H, bored, and wood piles. The document concludes by describing end bearing piles, friction piles, settlement reducing piles, and piles in fill.
California bearing ratio test (CBR TEST)Ujas Patel
The California Bearing Ratio (CBR) test is used to determine the bearing capacity of soil subgrades and base course materials. The test involves measuring the penetration of a piston into a remolded soil sample under increasing loads. Loads are applied to penetrate the soil at 1.25 mm/min up to 12.5 mm. The CBR value is calculated by dividing the load measured from the soil sample at a given penetration by the standard load value for that penetration from a reference material with a CBR of 100%. Higher CBR values indicate soils with greater bearing capacity for supporting structures.
The main components of an earth dam are as follows :
1. Impervious core
2. Pervious shell
3. Filter
4. Rock toe
5. U/S slope protection
6. D/S slope protection
7. Cutoff
core shouldnot be less than 3 m and its height should be 1 m more than the maximum water levelin the reservoir.
The upstream pervious zone provides free drainage during sudden drawdown. ,
Usually following types of filters are provided :
(1) Toe filter
(2) Horizontal drainage filter (blanket)
(3) Chimney drains
Such a filter is sometimes known as inverted filter or reverse filter.
Rock toe keeps the phreatic line well within the section and also facilitates drainage.
The following measures are taken to protect the slope.
(1) Rock riprap
(2) Concrete pavement
(3) Steel facing
(4) Bituminous pavement
(5) Precast concrete blocks
Cut off is required to
(1) reduce loss of stored water through foundation and abutments
(2) Prevent sub surface erosion by piping.
Cutoff may be provided in the following ways :
• by providing concrete cutoff wall
• by providing cutoff trench filled with impervious material
• by driving sheet pile
• by curtain grouting
Dynamic pile formulae estimate the ultimate load capacity of driven piles based on data collected during pile driving. The Engineering News formula is the simplest and most used dynamic formula. It relates the ultimate load capacity to the weight of the hammer, height of fall, and pile penetration per blow. The Modified Hiley's formula improves upon the Engineering News formula by accounting for energy losses during driving. Limitations of dynamic formulae include not representing the static load capacity and being unsuitable for cohesive soils where pore pressures can develop.
The document provides an introduction to soil mechanics and soil types. It defines soil mechanics as the branch of engineering that deals with the properties and behavior of soil. It discusses the different types of soils based on their geological origin such as glacial soil, residual soil, alluvial soil, and aeolian soil. It also classifies soils based on engineering properties such as clay, silt, sand, gravel, cobbles, and boulders. The key factors that influence the engineering behavior of soils like particle size, shape, mineral composition are also highlighted.
Earthquakes effects on reinforced concrete buildingsAnoop Shrestha
Reinforced concrete buildings have become common in Nepal, particularly in urban areas. They consist of concrete reinforced with steel bars. During earthquakes, inertia forces develop at each floor level and accumulate downwards, resulting in higher forces at lower stories. Floor slabs are rigid elements that bend with beams but keep columns at the same level moving together. Masonry infill walls between columns and slabs resist horizontal movement but can crack under severe shaking. Proper design requires reinforcement on all faces of beams and columns to resist bending moment reversals from earthquakes. Columns must be stronger than beams, and foundations stronger than columns, to ensure the building can deform without collapse.
dewatering in different soil conditions, methods, explanation of dewatering methods, : open sumps & ditches, vaccumm method deppwell point method electro osmosis metheod
This document summarizes a presentation on seismic loading based on the Bangladesh National Building Code (BNBC) 2017. It discusses various types of loads that must be considered in structural design like dead, live, earthquake, and wind loads. It also describes lateral force resisting systems like shear walls, braced frames, and moment resistant frames. Plan and vertical irregularities are defined and the short column problem is explained. Design recommendations are provided for earthquake resistant buildings including structural simplicity and redundancy. Site classification is described based on soil properties.
This document discusses key concepts in hydrology including hyetographs, hydrographs, unit hydrographs, and instantaneous unit hydrographs. It defines each term and concept and provides examples to illustrate them. Specifically, it defines a hyetograph as a plot of rainfall intensity over time, a hydrograph as a plot of discharge over time, and unit and instantaneous unit hydrographs as tools used to model watershed response to rainfall of different durations. Limitations and uses of unit hydrographs are also summarized.
This document provides details about typical cross-sections of roads and highways, including pavement surfaces and drainage elements. It discusses the importance of friction between wheels and pavement, pavement smoothness, light reflection characteristics, and drainage. It also describes typical layers in flexible pavements like seal coats, surface courses, binder courses, and subgrades. Finally, it outlines other cross-section elements such as shoulders, medians, footpaths, barriers, and bus bays.
A tuned mass damper is a device that reduces unwanted vibrations in structures by absorbing and dissipating the structure's energy. It consists of a mass attached to the structure with springs and dampers. The mass is tuned to the fundamental frequency of the structure so that it vibrates out of phase, canceling out the structural vibrations. Tuned mass dampers are commonly used in tall buildings, bridges, and other structures to reduce motion caused by wind or earthquakes and improve occupant comfort and structural integrity. They provide effective vibration control without an external power source, though proper tuning is required and a large mass may be needed.
Bearing capacity of shallow foundations by abhishek sharma ABHISHEK SHARMA
elements you should know about bearing capacity of shallow foundations are included in it. various indian standards are also used. Bearing capacity theories by various researchers are also included. numericals from GATE CE and ESE CE are also included.
This presentation is useful for GTU students in Building Construction subject in Subsurface investigation the popular topic in syllabus, this includes more images which will help to students & researchers for same.
The document discusses properties and testing of concrete. It provides information on the constituents of concrete including cement, coarse aggregate, fine aggregate, and water. It also discusses properties of concrete and reinforcements, including their relatively high compressive strength and lower tensile strength. Various tests performed on concrete are mentioned, including tests on workability, compressive strength, flexural strength, and fresh/hardened concrete. Design philosophies for reinforced concrete include the working stress method, ultimate strength method, and limit state method.
Disturbed soil sampling requires proper handling and storage of samples to accurately determine soil properties and structure. Samples must be clearly labelled during collection to avoid confusion later. Correct labelling and storage, such as in moisture-tight containers with wax coating, prevents changes to properties prior to testing. Proper filing of soil samples and data allows for better organization and control over the testing process.
STABILITY OF SLOPESSEEPAGE CONTROL MEASURES AND SLOPE PROTECTION
a finite slope AB, the stability of which is to be analyzed.
The method Consists of assuming a number of trial slip circles, and finding the factor of safety of each.
The circle corresponding to the minimum factor of safely is the critical slip circle.
Let AD be a trial slip circle, with r as the radius and O as the centre of rotation
Let W be the weight of the soil of the wedge ABDA of unit thickness, acting through the centroid G.
The driving moment MD will be equal to W x, where x, is the distance of line of action of W from the vertical line passing through the centre of rotation O.
if cu is the unit cohesion, and l is the length of the slip arc AD, the shear resistance developed along the slip surface will be equal to cu • l, which act at a radial distance r from centre of rotation O.
When slip is imminent in a cohesive soil, a tension crack will always DevelOP by the top surface of the slope along which no shear resistance can develop,
The depth of tension crack is given by
The effect of tension crack is to shorten the arc length along which shear resistance gets mobilised to AB' and to reduce the angle δ to δ'.
The length of the slip arc to be taken in the computation of resisting force is only AB', since tension crack break the continuity at B'.
The weight of the sliding wedge is weight of the area bounded by the ground surface, slip circle arc AB' and the tension crack.
This document provides information on different types of masonry construction, including:
- Stone masonry, including rubble masonry (coursed, uncoursed, etc.) and ashlar masonry.
- Brick masonry, including different bonds (English, Flemish, etc.), bricks, and brick joints.
- Composite masonry which uses two or more building materials, like stone facing with brick backing.
- Cavity walls, which feature an inner and outer wall separated by an air gap for insulation and water drainage.
The document compares brick and stone masonry and provides details on important masonry terms. It covers the key types and
Soil cement is a construction material made by mixing soil, cement, and water. It has good compressive strength but low tensile strength, making it prone to cracking. Soil cement can be used to reinforce road bases and salvage failing gravel roads in an efficient and economical way. Laboratory tests are conducted to determine the right proportions of soil, cement, and water for the project. Soil cement differs from concrete in that it binds soil particles together rather than just aggregates. It forms a rigid slab that distributes loads well and resists damage from weathering.
Determination of minimum and maximum density of given soil specimen (Badarpur Sand).
1. Average minimum dry density of Badarpur sand came out to be 1.469 g/cm³ which is greater than Yamuna River sand by about 11%.
2. Average maximum dry density of Badarpur sand came out to be 1.679 g/cm³ which is greater than Yamuna River sand by about 15%.
3. By visual inspection, Badarpur sand was found ANGULAR in shape.
4. Γd, max and Γd, min values are not unique or intrinsic properties of coarse-grained soils and depend not only on material properties, but also on the variations in laboratory determination methods.
5. A potential for degradation of the soil grains, i.e., grain crushing, exists during testing depending on the method used to determine Γd, max. The amount of energy applied to the sand during compaction is an important factor. There is a need to investigate the issue further and possibly arrive at universally acceptable laboratory methods to determine these values, which address all possible influencing factors.
Plate load test observation and calculation Plate load test image (usefulsear...Make Mannan
1. A plate load test was conducted at a site to determine the soil's bearing capacity for construction.
2. The test was performed 10.5 meters below ground level in dense gravelly soil. A 0.3x0.3 meter plate was used.
3. The failure load was 10.5 tons, with a corresponding settlement of 3.7 mm. The ultimate bearing capacity was determined to be 116 tons/m2, and the safe bearing capacity assuming a safety factor of 3.0 was 38 tons/m2.
This document discusses lateral earth pressure and its importance in retaining wall design. It defines lateral earth pressure as the pressure soil exerts horizontally. Lateral earth pressure depends on soil shear strength, pore water pressure, and equilibrium state. It is important for designing structures like retaining walls, bridges, and tunnels. The document discusses coefficient of lateral earth pressure (K), and the three states: at-rest (Ko), active (Ka), and passive (Kp) pressure. It also presents Coulomb and Rankine theories for calculating earth pressure and describes investigation methods and lateral wall supports like gravity, cantilever, anchored, soil-nailed, and reinforced walls. Geofoam is discussed as a method to reduce lateral stresses in
Reservoir sedimentation & its controlZahinRana
This document discusses reservoir sedimentation and its control. It begins with an introduction that defines a reservoir as an enlarged natural or artificial lake or pond created by a dam to store water. It then explains that reservoirs experience sedimentation as rivers carry sediment from erosion that is deposited in the reservoir, reducing its storage capacity over time. The document outlines the types of sediment as suspended or bed load. It lists the causes of sedimentation as the nature of catchment soils, vegetation cover, topography, rainfall intensity and land cultivation. Finally, it discusses methods to control sedimentation such as proper design, sediment control structures, and sediment removal.
This document provides information on testing procedures for road aggregates. It discusses the importance of aggregate testing and outlines various tests performed on aggregates including sieve analysis, aggregate crushing value test, aggregate impact test, abrasion test, soundness test, specific gravity and water absorption tests, and shape tests. For each test type, the document describes the significance, test setup, procedure, observations, and specifications. The goal of the testing is to evaluate aggregates' properties like gradation, strength, shape, durability and suitability for use in pavement construction.
The document discusses shear strength of soils. It defines shear strength as the soil's resistance to shearing stresses and deformation from particle displacement. Shear strength depends on cohesion between particles and frictional resistance, as modeled by the Mohr-Coulomb failure criterion. Laboratory tests like direct shear and triaxial shear tests are used to determine the shear strength parameters (c, φ) that describe a soil's failure envelope.
This document discusses foundation settlements and provides methods for estimating different types of settlements. It discusses:
- Immediate/elastic settlement which occurs during or right after construction and can be estimated using elastic theory equations.
- Consolidation settlement, which is time-dependent and occurs over months to years as water is squeezed out of clay soils. It includes primary consolidation from excess pore pressure dissipation and secondary compression from soil reorientation.
- Methods for estimating settlement in sandy soils using a strain influence factor approach.
- Equations for calculating primary and secondary consolidation settlement based on soil properties and changes in effective stress over time.
- Relationships between time factor, degree of consolidation, and rate of consolidation
This document summarizes a presentation on seismic loading based on the Bangladesh National Building Code (BNBC) 2017. It discusses various types of loads that must be considered in structural design like dead, live, earthquake, and wind loads. It also describes lateral force resisting systems like shear walls, braced frames, and moment resistant frames. Plan and vertical irregularities are defined and the short column problem is explained. Design recommendations are provided for earthquake resistant buildings including structural simplicity and redundancy. Site classification is described based on soil properties.
This document discusses key concepts in hydrology including hyetographs, hydrographs, unit hydrographs, and instantaneous unit hydrographs. It defines each term and concept and provides examples to illustrate them. Specifically, it defines a hyetograph as a plot of rainfall intensity over time, a hydrograph as a plot of discharge over time, and unit and instantaneous unit hydrographs as tools used to model watershed response to rainfall of different durations. Limitations and uses of unit hydrographs are also summarized.
This document provides details about typical cross-sections of roads and highways, including pavement surfaces and drainage elements. It discusses the importance of friction between wheels and pavement, pavement smoothness, light reflection characteristics, and drainage. It also describes typical layers in flexible pavements like seal coats, surface courses, binder courses, and subgrades. Finally, it outlines other cross-section elements such as shoulders, medians, footpaths, barriers, and bus bays.
A tuned mass damper is a device that reduces unwanted vibrations in structures by absorbing and dissipating the structure's energy. It consists of a mass attached to the structure with springs and dampers. The mass is tuned to the fundamental frequency of the structure so that it vibrates out of phase, canceling out the structural vibrations. Tuned mass dampers are commonly used in tall buildings, bridges, and other structures to reduce motion caused by wind or earthquakes and improve occupant comfort and structural integrity. They provide effective vibration control without an external power source, though proper tuning is required and a large mass may be needed.
Bearing capacity of shallow foundations by abhishek sharma ABHISHEK SHARMA
elements you should know about bearing capacity of shallow foundations are included in it. various indian standards are also used. Bearing capacity theories by various researchers are also included. numericals from GATE CE and ESE CE are also included.
This presentation is useful for GTU students in Building Construction subject in Subsurface investigation the popular topic in syllabus, this includes more images which will help to students & researchers for same.
The document discusses properties and testing of concrete. It provides information on the constituents of concrete including cement, coarse aggregate, fine aggregate, and water. It also discusses properties of concrete and reinforcements, including their relatively high compressive strength and lower tensile strength. Various tests performed on concrete are mentioned, including tests on workability, compressive strength, flexural strength, and fresh/hardened concrete. Design philosophies for reinforced concrete include the working stress method, ultimate strength method, and limit state method.
Disturbed soil sampling requires proper handling and storage of samples to accurately determine soil properties and structure. Samples must be clearly labelled during collection to avoid confusion later. Correct labelling and storage, such as in moisture-tight containers with wax coating, prevents changes to properties prior to testing. Proper filing of soil samples and data allows for better organization and control over the testing process.
STABILITY OF SLOPESSEEPAGE CONTROL MEASURES AND SLOPE PROTECTION
a finite slope AB, the stability of which is to be analyzed.
The method Consists of assuming a number of trial slip circles, and finding the factor of safety of each.
The circle corresponding to the minimum factor of safely is the critical slip circle.
Let AD be a trial slip circle, with r as the radius and O as the centre of rotation
Let W be the weight of the soil of the wedge ABDA of unit thickness, acting through the centroid G.
The driving moment MD will be equal to W x, where x, is the distance of line of action of W from the vertical line passing through the centre of rotation O.
if cu is the unit cohesion, and l is the length of the slip arc AD, the shear resistance developed along the slip surface will be equal to cu • l, which act at a radial distance r from centre of rotation O.
When slip is imminent in a cohesive soil, a tension crack will always DevelOP by the top surface of the slope along which no shear resistance can develop,
The depth of tension crack is given by
The effect of tension crack is to shorten the arc length along which shear resistance gets mobilised to AB' and to reduce the angle δ to δ'.
The length of the slip arc to be taken in the computation of resisting force is only AB', since tension crack break the continuity at B'.
The weight of the sliding wedge is weight of the area bounded by the ground surface, slip circle arc AB' and the tension crack.
This document provides information on different types of masonry construction, including:
- Stone masonry, including rubble masonry (coursed, uncoursed, etc.) and ashlar masonry.
- Brick masonry, including different bonds (English, Flemish, etc.), bricks, and brick joints.
- Composite masonry which uses two or more building materials, like stone facing with brick backing.
- Cavity walls, which feature an inner and outer wall separated by an air gap for insulation and water drainage.
The document compares brick and stone masonry and provides details on important masonry terms. It covers the key types and
Soil cement is a construction material made by mixing soil, cement, and water. It has good compressive strength but low tensile strength, making it prone to cracking. Soil cement can be used to reinforce road bases and salvage failing gravel roads in an efficient and economical way. Laboratory tests are conducted to determine the right proportions of soil, cement, and water for the project. Soil cement differs from concrete in that it binds soil particles together rather than just aggregates. It forms a rigid slab that distributes loads well and resists damage from weathering.
Determination of minimum and maximum density of given soil specimen (Badarpur Sand).
1. Average minimum dry density of Badarpur sand came out to be 1.469 g/cm³ which is greater than Yamuna River sand by about 11%.
2. Average maximum dry density of Badarpur sand came out to be 1.679 g/cm³ which is greater than Yamuna River sand by about 15%.
3. By visual inspection, Badarpur sand was found ANGULAR in shape.
4. Γd, max and Γd, min values are not unique or intrinsic properties of coarse-grained soils and depend not only on material properties, but also on the variations in laboratory determination methods.
5. A potential for degradation of the soil grains, i.e., grain crushing, exists during testing depending on the method used to determine Γd, max. The amount of energy applied to the sand during compaction is an important factor. There is a need to investigate the issue further and possibly arrive at universally acceptable laboratory methods to determine these values, which address all possible influencing factors.
Plate load test observation and calculation Plate load test image (usefulsear...Make Mannan
1. A plate load test was conducted at a site to determine the soil's bearing capacity for construction.
2. The test was performed 10.5 meters below ground level in dense gravelly soil. A 0.3x0.3 meter plate was used.
3. The failure load was 10.5 tons, with a corresponding settlement of 3.7 mm. The ultimate bearing capacity was determined to be 116 tons/m2, and the safe bearing capacity assuming a safety factor of 3.0 was 38 tons/m2.
This document discusses lateral earth pressure and its importance in retaining wall design. It defines lateral earth pressure as the pressure soil exerts horizontally. Lateral earth pressure depends on soil shear strength, pore water pressure, and equilibrium state. It is important for designing structures like retaining walls, bridges, and tunnels. The document discusses coefficient of lateral earth pressure (K), and the three states: at-rest (Ko), active (Ka), and passive (Kp) pressure. It also presents Coulomb and Rankine theories for calculating earth pressure and describes investigation methods and lateral wall supports like gravity, cantilever, anchored, soil-nailed, and reinforced walls. Geofoam is discussed as a method to reduce lateral stresses in
Reservoir sedimentation & its controlZahinRana
This document discusses reservoir sedimentation and its control. It begins with an introduction that defines a reservoir as an enlarged natural or artificial lake or pond created by a dam to store water. It then explains that reservoirs experience sedimentation as rivers carry sediment from erosion that is deposited in the reservoir, reducing its storage capacity over time. The document outlines the types of sediment as suspended or bed load. It lists the causes of sedimentation as the nature of catchment soils, vegetation cover, topography, rainfall intensity and land cultivation. Finally, it discusses methods to control sedimentation such as proper design, sediment control structures, and sediment removal.
This document provides information on testing procedures for road aggregates. It discusses the importance of aggregate testing and outlines various tests performed on aggregates including sieve analysis, aggregate crushing value test, aggregate impact test, abrasion test, soundness test, specific gravity and water absorption tests, and shape tests. For each test type, the document describes the significance, test setup, procedure, observations, and specifications. The goal of the testing is to evaluate aggregates' properties like gradation, strength, shape, durability and suitability for use in pavement construction.
The document discusses shear strength of soils. It defines shear strength as the soil's resistance to shearing stresses and deformation from particle displacement. Shear strength depends on cohesion between particles and frictional resistance, as modeled by the Mohr-Coulomb failure criterion. Laboratory tests like direct shear and triaxial shear tests are used to determine the shear strength parameters (c, φ) that describe a soil's failure envelope.
This document discusses foundation settlements and provides methods for estimating different types of settlements. It discusses:
- Immediate/elastic settlement which occurs during or right after construction and can be estimated using elastic theory equations.
- Consolidation settlement, which is time-dependent and occurs over months to years as water is squeezed out of clay soils. It includes primary consolidation from excess pore pressure dissipation and secondary compression from soil reorientation.
- Methods for estimating settlement in sandy soils using a strain influence factor approach.
- Equations for calculating primary and secondary consolidation settlement based on soil properties and changes in effective stress over time.
- Relationships between time factor, degree of consolidation, and rate of consolidation
Landslides occur when several factors converge, including heavy rainfall, earthquakes, volcanic eruptions, construction activities, and deforestation. They can cause significant damage by destroying infrastructure like roads, buildings, and bridges. Some high-risk areas include mountainous regions and coastal cliffs. To reduce landslide risk, proper drainage systems and replanting vegetation on slopes is recommended. During a landslide, it is important to seek high ground and avoid further endangering rescue workers.
Weathering and erosion shape Earth's surface through physical and chemical processes. Weathering breaks down rocks and minerals through mechanical and chemical processes. Mechanical weathering breaks rocks into smaller pieces without changing their composition, while chemical weathering alters the chemical makeup of rocks and minerals. Erosion transports weathered materials from their source, most commonly by water, wind, ice or gravity. Mass wasting specifically refers to the downslope movement of earth materials under the force of gravity by various processes such as rock falls, debris flows, slides and slumps. Factors like steep slopes, water saturation, earthquakes and removal of vegetation can make areas more prone to mass wasting.
This document discusses different types of mass movements such as landslides, rock falls, avalanches, mud flows, and debris flows. It describes key concepts related to mass movements including their anatomy, causes, triggers, and classification. Specifically, it discusses how gravity, water, earth materials, slope steepness, vegetation, climate, and time can all contribute to slope instability and mass wasting events. The document also provides examples of different mass movement types including rotational and translational landslides, falls, flows, slides, and subsidence.
Landslides occur when several factors such as heavy rainfall, earthquakes, or human activity cause gravity to dislodge earth and debris down slopes. They can destroy infrastructure, settlements, and cause loss of life. Some high risk areas include the Himalayas and Western Ghats. To reduce risk, hazard mapping and proper drainage are needed along with avoiding construction on steep slopes and preserving natural vegetation cover. Early warning systems use sensors to detect rising groundwater levels and predict potential landslides.
The document discusses the main factors that contribute to landslides: slope, precipitation, vegetation, and soil type. It then describes different types of landslides and provides videos showing landslides. The author is Joshua Breimayer, a student at Grand Valley State University studying mathematics and earth science.
This document discusses landslides, including their causes, types, effects, indicators, prevention, and safety measures. It defines landslides as the downward movement of soil, rock, and vegetation under gravity. Key points include that landslides occur when resisting forces are less than driving forces, and can be triggered by heavy rainfall, earthquakes, erosion, deforestation, and human activities like excavation. The document outlines common landslide types and describes their impacts, such as damage to infrastructure, loss of life, and secondary hazards like flooding. It provides guidance on landslide hazard mapping, mitigation strategies, and safety precautions during landslide events.
Este documento resume la teoría de la deriva continental propuesta por Alfred Wegener en la que los continentes se mueven debido a las corrientes de convección en el manto terrestre. Explica cómo evidencia como fósiles idénticos en continentes separados, anomalías magnéticas oceánicas y formaciones geológicas compatibles apoyan esta teoría. También describe los procesos de subducción, bordes constructivos y divergentes que impulsan la deriva de los continentes.
The document discusses various topics related to risk assessment and reduction. It notes that disaster losses have been increasing significantly in recent decades. Some key points made include: hazard x vulnerability = risk; risk is determined by the probability of an event and its consequences; vulnerability depends on factors like exposure, resilience, and coping capacity; and perceptions of risk can differ from actual measured risks.
This presentations explains the main definitions related to flood risk management. and how to assess the Vulnerability of the society towards flood dangers. and flood risk analysis process. and gives some examples of flood risk assessment applications.
This document provides an outline for a course on Hazard and Disaster Management taught by Engr. Muhammad Waqas Muneer at the Institute of Southern Punjab in Multan, Pakistan. The course covers introduction to natural and human-induced hazards and disasters, disaster management phases from pre-disaster to post-disaster, infrastructure monitoring and protection strategies, awareness programs, and recommended textbooks. The first lecture introduces key concepts of hazards, vulnerability, risk, and disasters and provides examples of natural hazards that occur in Pakistan.
The document discusses various aspects of cyclones including their damage potential, impact on society, elements at risk, and aims of disaster management. It notes that vulnerability and lack of preparedness can lead to huge losses and damage from cyclones, but raising awareness, developing action plans, and making communities more resilient can help ensure quicker recovery with reduced losses. Key elements at risk include slopes, coasts, low-lying areas, infrastructure, crops, and weak housing. The scale of disaster depends on several factors like lead time, hazard intensity, population density, and vulnerabilities of elements at risk.
Week 1 meteorological hazard and risk assessmentsfreelance
Cyclone Nargis caused catastrophic damage when it struck Myanmar in 2008. Over 138,000 people were killed and millions were left homeless. Disaster preparedness was extremely weak with no early warning system, shelters, or evacuation plans. Warnings underestimated the storm's strength. Relief efforts were slowed initially as Myanmar's military government resisted international aid. The ASEAN-led coordinating mechanism, including the Tripartite Core Group, helped bridge this and set up an effective response, issuing visas for aid workers and coordinating rebuilding efforts. This model provided lessons for coordinating responses where politics complicate relief operations.
This document provides an overview of disaster risk assessment. It defines disaster risk assessment as a participatory analysis of hazards, vulnerability, and capacity. The disaster risk assessment process involves hazard assessment to identify hazards, vulnerability assessment to identify elements at risk, and capacity assessment. Tools for hazard assessment discussed include hazard maps, historical profiles, seasonal calendars, and hazard matrices. Key factors to consider in understanding hazards are also outlined, such as origin, warning signs, force, speed of onset, frequency, seasonality, and duration.
Here one will know the detail concepts of Hazards and Disaster, their characteristics, types, identification, nature with mechanisms of occurence like risks and vulnerable factors, their types- natural disaster and human and also their characteristics of hazards and disaster
The document summarizes rights-based participatory risk assessment and planning (RiPRAP) for hazards, which involves community members examining hazards, vulnerabilities, capacities, and impacts on human and children's rights. It describes assessing the nature, speed of onset, frequency, duration, and force of hazards. It also outlines assessing vulnerabilities of elements at risk like people, structures, facilities, livelihoods and the environment, and the causes of vulnerabilities. Tools for assessment include maps, walks, calendars and interviews. The progression of vulnerability from underlying causes to unsafe conditions is depicted. Assessments of community capacities in times of crisis are also summarized.
The document provides an overview of key concepts related to hazards and disasters. It defines hazards as dangerous phenomena that can cause losses, defines disasters as serious disruptions exceeding a community's coping abilities, and notes that disasters result from the combination of hazards, exposure, vulnerability, and capacity. It also classifies hazards into natural, technological, and complex categories, with natural hazards further divided into geophysical, meteorological, hydrological, climatological, and biological subgroups. Specific natural hazards discussed include earthquakes, volcanic eruptions, landslides, subsidence, and tsunamis.
Toward Greater Hazard Resilience in a Changing WorldOregon Sea Grant
This document discusses the challenges of increasing hazard resilience in coastal communities in a changing world. It outlines trends like rising sea levels, changes in storm regimes, growing coastal populations and development, and loss of natural defenses that exacerbate coastal hazards. These trends point to the need to move beyond traditional approaches and work towards building community capacity to adapt to changing risks. The document argues that achieving true resilience requires embracing new ways of thinking that prioritize anticipating hazards, reducing vulnerabilities, and supporting long-term learning and change.
A disaster is defined as any event, natural or man-made, that threatens lives and property and disrupts normal life. Disasters exceed the ability of affected communities and governments to cope. Hazards threaten people, structures, and assets and can cause disasters. Vulnerability is the likelihood of damage from a hazard due to factors like proximity and susceptibility. Risk is the probability of consequences from hazards people are exposed to. Disaster management involves coordination across organizations in preparedness, response, and recovery phases of disasters to reduce risks and improve capacity to handle disasters.
This document discusses new directions for disaster risk reduction. It notes increasing global risks like climate change, pandemics, and conflicts that exacerbate vulnerability. Disasters are seen not just as physical events but as outcomes of social, economic, and political factors that shape vulnerability. Cascading and interconnected disasters are a growing threat as infrastructure and systems become more interdependent. Strategies for managing risk emphasize addressing root causes of vulnerability rather than just preparing for hazards. International frameworks for disaster risk reduction are critiqued as weak on accountability and potentially reinforcing top-down approaches. Overall, new approaches are needed that tackle growing social and economic inequalities driving greater precarity and susceptibility to harm.
The RAMSES Slidedeck is meant to support cities (including municipal staff, policy makers and other stakeholders) to explain the importance of climate adaptation to different stakeholders by introducing the main topics tackled in the RAMSES Project and raising awareness on crucial policy-relevant aspects of climate adaptation.
The document summarizes information from the 2016 International Conference on Natural Hazards and Infrastructure. It discusses topics including population growth and distribution, natural hazards such as earthquakes, floods, and landslides. It also discusses concepts of risk, vulnerability and resilience. Key data is presented on fatalities and economic losses from major natural disasters between 1980-2014. The importance of investment in prevention versus response is highlighted. The goal of the conference is to reduce risks from natural hazards through greater public awareness, professional guidance, and political pressure.
1. There is a range of tectonic hazards associated with both volcanoes and earthquakes, including lava, pyroclastics, ash, lahars, ground shaking, displacement, liquefaction, and tsunamis.
2. The specific impacts of tectonic hazards vary depending on factors like the duration and scale of the hazard, how frequently it occurs, its magnitude, and the level of economic development in the affected area.
3. Countries approach coping with tectonic hazards in different ways depending on their wealth and access to technology, employing strategies like modifying hazards, reducing vulnerability, and mitigating losses.
The film risk assessment identifies four potential hazards during the filming of Huckleberry Woods:
1) Using the camera which poses a low risk if handled carefully
2) Running through the woodlands which poses a medium risk to the actresses unless the ground is level with no obstacles
3) Using and setting up the tent which poses a low risk if done correctly without harming actors or the tent
4) A dragging scene which poses a medium risk to actresses if obstacles are present that could cause injury
Control measures are outlined to minimize risks, such as careful equipment handling, ensuring a clear path and no obstacles that could cause harm.
The document discusses tectonic hazards and their impacts on communities. It explores the different types and levels of challenges posed by varying forms of tectonic activity such as earthquakes, tsunamis, and volcanic eruptions. It examines how the impacts of tectonic hazards vary depending on location and economic development through case studies of contrasting locations. Approaches to reducing risks from tectonic hazards are also discussed.
This document provides a summary of key topics in engineering, education, and empowerment. It discusses the importance of being able to explain complex topics simply, embracing change and new opportunities, and promoting lifelong learning and equal access to education to empower individuals. Climate change, stakeholder involvement, and sustainability are highlighted as important challenges. The effectiveness of different teaching methods like lectures and practical exercises are also examined.
How to Make a Field Mandatory in Odoo 17Celine George
In Odoo, making a field required can be done through both Python code and XML views. When you set the required attribute to True in Python code, it makes the field required across all views where it's used. Conversely, when you set the required attribute in XML views, it makes the field required only in the context of that particular view.
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.
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Walmart Business+ and Spark Good for Nonprofits.pdfTechSoup
"Learn about all the ways Walmart supports nonprofit organizations.
You will hear from Liz Willett, the Head of Nonprofits, and hear about what Walmart is doing to help nonprofits, including Walmart Business and Spark Good. Walmart Business+ is a new offer for nonprofits that offers discounts and also streamlines nonprofits order and expense tracking, saving time and money.
The webinar may also give some examples on how nonprofits can best leverage Walmart Business+.
The event will cover the following::
Walmart Business + (https://business.walmart.com/plus) is a new shopping experience for nonprofits, schools, and local business customers that connects an exclusive online shopping experience to stores. Benefits include free delivery and shipping, a 'Spend Analytics” feature, special discounts, deals and tax-exempt shopping.
Special TechSoup offer for a free 180 days membership, and up to $150 in discounts on eligible orders.
Spark Good (walmart.com/sparkgood) is a charitable platform that enables nonprofits to receive donations directly from customers and associates.
Answers about how you can do more with Walmart!"
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 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.
Leveraging Generative AI to Drive Nonprofit InnovationTechSoup
In this webinar, participants learned how to utilize Generative AI to streamline operations and elevate member engagement. Amazon Web Service experts provided a customer specific use cases and dived into low/no-code tools that are quick and easy to deploy through Amazon Web Service (AWS.)
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
LAND USE LAND COVER AND NDVI OF MIRZAPUR DISTRICT, UPRAHUL
This Dissertation explores the particular circumstances of Mirzapur, a region located in the
core of India. Mirzapur, with its varied terrains and abundant biodiversity, offers an optimal
environment for investigating the changes in vegetation cover dynamics. Our study utilizes
advanced technologies such as GIS (Geographic Information Systems) and Remote sensing to
analyze the transformations that have taken place over the course of a decade.
The complex relationship between human activities and the environment has been the focus
of extensive research and worry. As the global community grapples with swift urbanization,
population expansion, and economic progress, the effects on natural ecosystems are becoming
more evident. A crucial element of this impact is the alteration of vegetation cover, which plays a
significant role in maintaining the ecological equilibrium of our planet.Land serves as the foundation for all human activities and provides the necessary materials for
these activities. As the most crucial natural resource, its utilization by humans results in different
'Land uses,' which are determined by both human activities and the physical characteristics of the
land.
The utilization of land is impacted by human needs and environmental factors. In countries
like India, rapid population growth and the emphasis on extensive resource exploitation can lead
to significant land degradation, adversely affecting the region's land cover.
Therefore, human intervention has significantly influenced land use patterns over many
centuries, evolving its structure over time and space. In the present era, these changes have
accelerated due to factors such as agriculture and urbanization. Information regarding land use and
cover is essential for various planning and management tasks related to the Earth's surface,
providing crucial environmental data for scientific, resource management, policy purposes, and
diverse human activities.
Accurate understanding of land use and cover is imperative for the development planning
of any area. Consequently, a wide range of professionals, including earth system scientists, land
and water managers, and urban planners, are interested in obtaining data on land use and cover
changes, conversion trends, and other related patterns. The spatial dimensions of land use and
cover support policymakers and scientists in making well-informed decisions, as alterations in
these patterns indicate shifts in economic and social conditions. Monitoring such changes with the
help of Advanced technologies like Remote Sensing and Geographic Information Systems is
crucial for coordinated efforts across different administrative levels. Advanced technologies like
Remote Sensing and Geographic Information Systems
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Changes in vegetation cover refer to variations in the distribution, composition, and overall
structure of plant communities across different temporal and spatial scales. These changes can
occur natural.
How to Setup Warehouse & Location in Odoo 17 InventoryCeline George
In this slide, we'll explore how to set up warehouses and locations in Odoo 17 Inventory. This will help us manage our stock effectively, track inventory levels, and streamline warehouse operations.
2. Theo van Asch: Faculty of Geosciences Utrecht in collaboration with Cees van Westen and Dinand Alkma ITC Enschede
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4. Landslide hazard analysis Landslide risk analysis . Landslide risk management R isk governance The Landslide problem
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8. Types of movement Fall Topple Slide Rotational slide Translational slide Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
10. Velocity of mass movement related to water content and type Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
11. Translational slide Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
12. Rotational slide (Slump) Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
13. Rotational slide (Slump) Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
14. debris flow Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
15. Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs? debris flow
16. Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
17. Debris avalanche Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
18. Debris avalanche Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
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21. Landslide maps Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
22. Landslide maps Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
23. Use of factor maps . Slope classes Landuse Aspect classes Soil depth Lithology Distance from river Weight maps Susceptibility map Total weight Statistical correlation techniques with landslide map Elevation Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
24. Susceptibility map Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
25. The landslide hazard map Susceptibility map plus temporal frequency Landslide hazard maps Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
26. 1D formulation The driving force and frictional resistance The role of deterministic models Deterministic (physical ) models are useful to determine the temporal frequency of slope instability Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs? x z h i 1m 1/cos h i-1 h i+1 fl,, c , x x d i-1
27. Driving forces Resisting forces Groundwater recharge Precipitation /percolation Safety factor<1 Slope triggered by rain Coupled hydrological-slope stability models calculates over time: Temporal frequency of instability Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
28. The role of deterministic models Deterministic (physical ) models are also useful to determine the speed extent and impact of landslides Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
29. Rapid gravitational debris/mudflows Source area Rema ître 2006 Faucon creek French Alps 2003 event Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
30. Rapid gravitational debris/mudflows Transportation and deposition area Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
31. Faucon creek French Alps: 2003 event Rapid gravitational debris/mudflows Source area Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
32. Faucon creek French Alps: 2003 event Rapid gravitational debris/mudflows Scouring in transportation area Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
33. Rapid gravitational debris/mudflows Deposition area Faucon creek French Alps: 2003 event Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
34. Coh = 1 kPa , K = 5.0E-2 m kPa.s -1 Average velocity: 6 m s -1 Model simulation in deposition area Faucon Barcelonette Faucon creek French Alps: 2003 event Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
35. Wartschenbach 1997 (Austria) Rapid gravitational debris/mudflows Deposition area Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
36. Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
37. Simulation of an earthflow Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
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39. Different elements at risk Physical elements Housing Infrastructure (roads, railways.airport etc ) Critical facilities (schools hospitals police..etc ) Utilities (Power supply ,transport services,governmental services..etc) Economic elements Buseness and trade activities, access to work,agricultural land, work force, Societal elements Moving people, vulnerable age categories,Low income groups,homeless people, disabled ,gender Environmental elements Resources: like air, water, fauna, flora ,biodiversity, Type? Where? How often? How fast and intense? How far? Which elements at risk ? How vulnerable? Costs?
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42. Rockfall on school: 1400 deaths Landslide on neighborhood: 800 deaths Flood caused by a landslide dam Debris flow on 14/9 destroying the remains of Old Beichuan City of Beichuan, deserted after the earthquake on 12 May Type? Where? How often? How fast and intense? How far? Which elements at risk ? How vulnerable? Costs?
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44. Types of vulnerability Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
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47. Damages due to various landslides. Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
48. Damages due to various landslides. Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
49. Quantitative risk assessment Risk = Hazard * Vulnerability * Amount = Temporal frequency (H) * Degree of loss to elements at risk (V) *Cost quantification of elements at risk (A) Quantitative Risk Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs?
50. Specific quantitative risk Specific Risk =0.1 * ((0.1 *50.000)+(0.5*200.000)+(1*100.000)) Landslide Quantitative specific Risk = H*V*A Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs? A=US $ 50.000 V = 0.1 RP = 10 years H=0.1 A=US $ 200.000 V = 0.5 V = 1 A=US $ 100.000
51. Landslide risk map of the Arno river basin over a period of 30 years. The risk is expressed as economic losses due to landslides for each terrain unit (from Catani et al. 2005) Type? Where? How often? How fast and intense? How far? Which elements at risk? How vulnerable? Costs? Risk map Arno river basin Italy