Bridge Bearings has been considered as of huge importance in civil engineering. It plays a significant role in the structure of bridges. This presentation covers the complete study of Bridge Bearings.
The document provides guidance on loads and forces that should be considered when designing bridges, including:
1. Dead loads, live loads, dynamic loads, longitudinal forces, wind loads, centrifugal forces, horizontal water currents, buoyancy, earth pressures, temperature effects, and seismic loads.
2. It describes the various live load models (Class A, B, 70R, AA) and provides details on load intensity, wheel/track configuration, and load combinations.
3. Design recommendations are given for calculating impact factors, braking forces, wind loads, water current pressures, earth pressures, and seismic forces.
Sleepers, also called ties, are transverse members laid beneath rails to distribute load from trains to the track bed. They come in various materials including wood, steel, concrete, and plastic. Wooden sleepers are most common but have short lifespans while concrete and steel last longer. All sleepers must firmly support rails, maintain proper gauge, and evenly distribute heavy train loads over a wide area of ballast for track stability.
The document discusses bridge types, components, selection criteria, and design considerations. It begins by defining what a bridge is and its purpose in transportation systems. It then covers typical bridge components and various structural forms for bridges based on material, span length, and other factors. Key criteria for selecting bridge types include span length, site conditions, cost, and aesthetics. The document emphasizes that aesthetic design requires considering function, proportion, harmony, order/rhythm, and contrast/texture to create pleasing structures that blend with their environments.
This document provides an overview of bridges, including:
1) It defines what a bridge is, its main components, and classifications based on various factors such as material, location, purpose, and structural design.
2) The key components of a bridge are described as the superstructure, which is above the bearings, and the substructure, which is below the bearings.
3) Bridges are investigated and designed based on considerations like span length, site conditions, and cost. Maintaining bridges requires regular inspections to identify deterioration and prevent structural failures.
This document discusses bridge scour, which is the removal of sediment around bridge piers and abutments due to moving water. Scour can undermine bridge foundations and has caused 46 major bridge failures in the US from 1961-1976. The basic components of a bridge are the substructure, which includes piers, abutments and foundations, and the superstructure, which is the deck. Piers can be column or wall types and are vulnerable to scour, which forms scour holes through vortex formation and increased shear stress on sediments. The document presents photos of bridge failures from scour and methods to monitor and protect against scour using gravel bags, rock armor, and sonar scour monitors.
This document provides information on reinforced earth walls, including their components and construction methodology. It discusses that reinforced earth walls combine earth and linear reinforcing strips to bear large tensile stresses. The key components are reinforcing elements, soil backfill (which can be replaced with fly ash), and a facing element. Geogrids are used as reinforcements and provide strength in tension, while fly ash or soil in the backfill provides compression strength. The document also outlines design considerations around drainage, joint materials, and stability checks for these types of walls.
Bridge Bearings has been considered as of huge importance in civil engineering. It plays a significant role in the structure of bridges. This presentation covers the complete study of Bridge Bearings.
The document provides guidance on loads and forces that should be considered when designing bridges, including:
1. Dead loads, live loads, dynamic loads, longitudinal forces, wind loads, centrifugal forces, horizontal water currents, buoyancy, earth pressures, temperature effects, and seismic loads.
2. It describes the various live load models (Class A, B, 70R, AA) and provides details on load intensity, wheel/track configuration, and load combinations.
3. Design recommendations are given for calculating impact factors, braking forces, wind loads, water current pressures, earth pressures, and seismic forces.
Sleepers, also called ties, are transverse members laid beneath rails to distribute load from trains to the track bed. They come in various materials including wood, steel, concrete, and plastic. Wooden sleepers are most common but have short lifespans while concrete and steel last longer. All sleepers must firmly support rails, maintain proper gauge, and evenly distribute heavy train loads over a wide area of ballast for track stability.
The document discusses bridge types, components, selection criteria, and design considerations. It begins by defining what a bridge is and its purpose in transportation systems. It then covers typical bridge components and various structural forms for bridges based on material, span length, and other factors. Key criteria for selecting bridge types include span length, site conditions, cost, and aesthetics. The document emphasizes that aesthetic design requires considering function, proportion, harmony, order/rhythm, and contrast/texture to create pleasing structures that blend with their environments.
This document provides an overview of bridges, including:
1) It defines what a bridge is, its main components, and classifications based on various factors such as material, location, purpose, and structural design.
2) The key components of a bridge are described as the superstructure, which is above the bearings, and the substructure, which is below the bearings.
3) Bridges are investigated and designed based on considerations like span length, site conditions, and cost. Maintaining bridges requires regular inspections to identify deterioration and prevent structural failures.
This document discusses bridge scour, which is the removal of sediment around bridge piers and abutments due to moving water. Scour can undermine bridge foundations and has caused 46 major bridge failures in the US from 1961-1976. The basic components of a bridge are the substructure, which includes piers, abutments and foundations, and the superstructure, which is the deck. Piers can be column or wall types and are vulnerable to scour, which forms scour holes through vortex formation and increased shear stress on sediments. The document presents photos of bridge failures from scour and methods to monitor and protect against scour using gravel bags, rock armor, and sonar scour monitors.
This document provides information on reinforced earth walls, including their components and construction methodology. It discusses that reinforced earth walls combine earth and linear reinforcing strips to bear large tensile stresses. The key components are reinforcing elements, soil backfill (which can be replaced with fly ash), and a facing element. Geogrids are used as reinforcements and provide strength in tension, while fly ash or soil in the backfill provides compression strength. The document also outlines design considerations around drainage, joint materials, and stability checks for these types of walls.
There are two main types of joints in rigid pavement: longitudinal joints and transverse joints. Longitudinal joints run parallel to traffic flow, while transverse joints run perpendicular. Transverse joints include construction joints, contraction joints, and expansion joints. Construction joints define the boundaries of individual concrete placements. Contraction joints relieve tensile stresses from shrinkage. Expansion joints allow for expansion of the concrete due to rising temperatures.
The document discusses the balanced cantilever method of bridge construction. It begins by explaining that this method is used for bridges with spans between 50-250m, and involves attaching precast or cast-in-place segments in an alternating manner from each end of cantilevers supported by piers. This method is well-suited for irregular spans, congested sites, and environmentally sensitive areas. It also discusses advantages like determinacy and reduced cracking risks. The document then goes into detail about construction sequences, member proportioning, superstructure types, and analysis of a specific balanced cantilever bridge in Kochi, India.
This document discusses the construction and maintenance of bituminous roads. It describes the different types of pavements including flexible and rigid pavements. For bituminous construction, it explains the procedures for subgrade preparation, application of tack coats and prime coats, and construction of different layers using techniques like penetration macadam, bituminous macadam, and seal coating. It also discusses the use of hot mix and cold mix methods using emulsions and cutbacks for construction and maintenance of bituminous roads.
Rigid pavements are concrete slabs that distribute vehicle loads through beam action. They have high flexural strength and small deflections compared to flexible pavements. The presentation discusses the types of rigid pavements including jointed plain concrete, jointed reinforced concrete, and continuously reinforced concrete pavements. It also covers the design factors for rigid pavements such as traffic loading, subgrade strength, environmental conditions, and material properties. Rigid pavements are designed to last 30 years with minimal maintenance required over the design life.
This document is a summer training presentation submitted by a civil engineering student for partial fulfillment of their bachelor's degree. It summarizes key concepts in road modification and construction including different types of roads, pavements, and equipment used. Specifically, it discusses earthwork preparation, flexible and rigid pavements, common road types in India like national highways and village roads, and components of roadway construction such as the carriageway, pavement, kerb, and shoulder. Examples of equipment used are compacting rollers, dozers, scrapers, concrete mixers, and barricading materials. The presentation then provides details of a specific road project to upgrade an 8 km long village road.
Bridge bearings allow movement of the bridge superstructure and transfer forces between the superstructure and substructure. Common early bearing types included pin, roller, rocker, and sliding metal bearings. Modern bearing types include pot, elastomeric, laminated elastomeric, and sliding bearings. Selection of the appropriate bearing type depends on required movements and load resistance based on AASHTO guidelines. An example is provided demonstrating the design process for an elastomeric bearing, including calculation of bearing loads, preliminary sizing, and stress checks to determine the final design thickness.
This document discusses different types of bridge foundations. It describes shallow foundations like open foundations and block foundations. It also describes deep foundations such as pile foundations and well foundations. Pile foundations use timber, reinforced concrete, or bored pipe piles below the river bed. Well foundations involve constructing a well structure and sinking it into the ground to transmit heavy loads. The document provides details on the components and advantages of well foundations. It also lists ideal characteristics for selecting a bridge site such as suitable foundation material, straight banks, and minimum obstructions.
Bridges are structures built to span physical obstacles without blocking passage underneath. The key components of bridges include foundations, abutments, piers, piles, girders, decks, and bearings. Foundations transmit loads from the rest of the bridge evenly to the soil or bedrock below. Piers and abutments support the superstructure of beams and decks that people or vehicles pass over.
This document discusses different methods of constructing underground structures beneath existing surfaces without disrupting traffic, including box jacking, arched jacking, and thrust boring. Box jacking involves pushing pre-cast concrete boxes into the ground with hydraulic jacks to form the structure. Arched jacking and thrust boring use similar techniques to jack pipes through the ground. Freezing the soil is another method used to stabilize the ground and prevent issues like water seepage when constructing underground. Case studies demonstrate how these techniques have been applied to real projects.
Reinforced earth is a combination of earth and linear reinforcing strips that are capable of bearing large tensile stresses.
The reinforcement provided by these strips enable the mass to resist the tension in a way which the earth alone could not. The source of this resistance to tension is the internal friction of soil, because the stresses that are created within the mass are transferred from soil to the reinforcement strips by friction.
Pile foundation is important for construction of foundation where bearing capacity of soil is poor. Pile foundation is use for distribution of uneven load of superstructure.There are so many type of pile are use for construction. Here i present some of pile with suitable condition for construction and methods for construction.
Thank you.
Bridges and its Types & Components by Chetan BishtChetanBisht16
This is very Useful for Fresher Civil engineers and also for Student of Civil Engineering . This Slide show almost cover the Basic Knowledge about Bridges
5.track or permanent way and track stressesMani Vel
The document discusses the components and stresses acting on railroad tracks. It describes the main parts of a track including the rails, sleepers, ballast, and formation. The rails are joined by fish plates and bolts and fastened to sleepers. Sleepers are embedded in ballast which provides drainage and load distribution. A good track requires proper gauge, cross-leveling, alignment, gradient, and resilience to provide a comfortable ride while withstanding forces from train movement and varying temperatures. Wheels are coned rather than flat to reduce wear on flanges and rails and allow for lateral movement.
Bridges: Classification of bridges – with respect to construction
materials, structural behavior of super structure, span, sub structure,
purpose. Temporary and movable bridges. Factors affecting site
selection. Various loads/stresses acting on bridges. Bridge hydrology –
design discharge, water way, afflux, scour depth, economical span.
Bridge components – foundation, piers, abutments, wing wall, approach,
bearings, floor, girders, cables, suspenders. Methods of erection of
different types of bridges. River training works and maintenance of
bridges. Testing and strengthening of bridges. Bridge architect.
The document discusses limit state design of reinforced concrete structures. It introduces limit states as conditions where the structure becomes unfit for use, including limit states of strength and serviceability. Limit state design involves characterizing loads and resistances as random variables and using partial safety factors on loads and resistances to achieve a target reliability. The document outlines the general principles of limit state design according to Indian Standard code IS 800, including defining actions, factors governing strength limits, and serviceability limits related to deflection, vibration and durability.
Prestressed concrete ,post tensioning ,pre tensioning, where normal concrete can not be used and need of more strength is required this type of concrete are used. Metal bars are replaced by the tendoms which are generally used to create tension in concrete. So because of that beam bends in upward direction and when load is applied it come in normal conditon.
The document discusses the design and construction of a 4-lane 90m railway over bridge in Chand Sarai, Lucknow. Key steps in the construction process include surveying, engineering design, laying pile foundations, installing bearings and girders, shuttering, and concreting. Tests were conducted on materials and foundations to ensure quality. The bridge was designed to allow road traffic to safely pass over the railway line.
WBM roads are low-cost roads made of crushed stone aggregates that are mechanically interlocked and bound with water. The aggregates are spread and rolled to form the wearing surface. WBM roads can be used as a base course for bituminous or concrete roads. They have a thickness ranging from 8-30 cm and a camber of 2.5-3%. Construction involves preparing the subgrade, laying the base course and intermediate layers, and forming the wearing surface. Rolling is used to compact the layers and requires sprinkling water while rolling over 80 passes.
Bridge bearings allow for controlled movement between the bridge deck and piers/substructure. The earliest bearings were metal sliding or roller bearings, while modern bridges primarily use elastomeric bearings made of rubber. Elastomeric bearings are advantageous as they require little maintenance, easily accommodate multi-directional movement, are inexpensive, and can absorb vibrations. Proper selection and design of bearings is important for transferring loads while preventing excessive stresses in the bridge structure from temperature changes, traffic, or seismic activity.
Bridge bearings are structural devices installed between bridge substructures and superstructures. They transfer loads while allowing for movement. There are two main types: expansion bearings, which allow translational and rotational movement, and fixed bearings, which allow limited translational and rotational movement. Common bearing types include sliding, rocker and pin, roller, elastomeric, curved, pot, and disk bearings. Each has distinct structures, materials, and abilities to accommodate different load types and movements. Regular inspection and maintenance are important due to risks of corrosion and damage over time.
There are two main types of joints in rigid pavement: longitudinal joints and transverse joints. Longitudinal joints run parallel to traffic flow, while transverse joints run perpendicular. Transverse joints include construction joints, contraction joints, and expansion joints. Construction joints define the boundaries of individual concrete placements. Contraction joints relieve tensile stresses from shrinkage. Expansion joints allow for expansion of the concrete due to rising temperatures.
The document discusses the balanced cantilever method of bridge construction. It begins by explaining that this method is used for bridges with spans between 50-250m, and involves attaching precast or cast-in-place segments in an alternating manner from each end of cantilevers supported by piers. This method is well-suited for irregular spans, congested sites, and environmentally sensitive areas. It also discusses advantages like determinacy and reduced cracking risks. The document then goes into detail about construction sequences, member proportioning, superstructure types, and analysis of a specific balanced cantilever bridge in Kochi, India.
This document discusses the construction and maintenance of bituminous roads. It describes the different types of pavements including flexible and rigid pavements. For bituminous construction, it explains the procedures for subgrade preparation, application of tack coats and prime coats, and construction of different layers using techniques like penetration macadam, bituminous macadam, and seal coating. It also discusses the use of hot mix and cold mix methods using emulsions and cutbacks for construction and maintenance of bituminous roads.
Rigid pavements are concrete slabs that distribute vehicle loads through beam action. They have high flexural strength and small deflections compared to flexible pavements. The presentation discusses the types of rigid pavements including jointed plain concrete, jointed reinforced concrete, and continuously reinforced concrete pavements. It also covers the design factors for rigid pavements such as traffic loading, subgrade strength, environmental conditions, and material properties. Rigid pavements are designed to last 30 years with minimal maintenance required over the design life.
This document is a summer training presentation submitted by a civil engineering student for partial fulfillment of their bachelor's degree. It summarizes key concepts in road modification and construction including different types of roads, pavements, and equipment used. Specifically, it discusses earthwork preparation, flexible and rigid pavements, common road types in India like national highways and village roads, and components of roadway construction such as the carriageway, pavement, kerb, and shoulder. Examples of equipment used are compacting rollers, dozers, scrapers, concrete mixers, and barricading materials. The presentation then provides details of a specific road project to upgrade an 8 km long village road.
Bridge bearings allow movement of the bridge superstructure and transfer forces between the superstructure and substructure. Common early bearing types included pin, roller, rocker, and sliding metal bearings. Modern bearing types include pot, elastomeric, laminated elastomeric, and sliding bearings. Selection of the appropriate bearing type depends on required movements and load resistance based on AASHTO guidelines. An example is provided demonstrating the design process for an elastomeric bearing, including calculation of bearing loads, preliminary sizing, and stress checks to determine the final design thickness.
This document discusses different types of bridge foundations. It describes shallow foundations like open foundations and block foundations. It also describes deep foundations such as pile foundations and well foundations. Pile foundations use timber, reinforced concrete, or bored pipe piles below the river bed. Well foundations involve constructing a well structure and sinking it into the ground to transmit heavy loads. The document provides details on the components and advantages of well foundations. It also lists ideal characteristics for selecting a bridge site such as suitable foundation material, straight banks, and minimum obstructions.
Bridges are structures built to span physical obstacles without blocking passage underneath. The key components of bridges include foundations, abutments, piers, piles, girders, decks, and bearings. Foundations transmit loads from the rest of the bridge evenly to the soil or bedrock below. Piers and abutments support the superstructure of beams and decks that people or vehicles pass over.
This document discusses different methods of constructing underground structures beneath existing surfaces without disrupting traffic, including box jacking, arched jacking, and thrust boring. Box jacking involves pushing pre-cast concrete boxes into the ground with hydraulic jacks to form the structure. Arched jacking and thrust boring use similar techniques to jack pipes through the ground. Freezing the soil is another method used to stabilize the ground and prevent issues like water seepage when constructing underground. Case studies demonstrate how these techniques have been applied to real projects.
Reinforced earth is a combination of earth and linear reinforcing strips that are capable of bearing large tensile stresses.
The reinforcement provided by these strips enable the mass to resist the tension in a way which the earth alone could not. The source of this resistance to tension is the internal friction of soil, because the stresses that are created within the mass are transferred from soil to the reinforcement strips by friction.
Pile foundation is important for construction of foundation where bearing capacity of soil is poor. Pile foundation is use for distribution of uneven load of superstructure.There are so many type of pile are use for construction. Here i present some of pile with suitable condition for construction and methods for construction.
Thank you.
Bridges and its Types & Components by Chetan BishtChetanBisht16
This is very Useful for Fresher Civil engineers and also for Student of Civil Engineering . This Slide show almost cover the Basic Knowledge about Bridges
5.track or permanent way and track stressesMani Vel
The document discusses the components and stresses acting on railroad tracks. It describes the main parts of a track including the rails, sleepers, ballast, and formation. The rails are joined by fish plates and bolts and fastened to sleepers. Sleepers are embedded in ballast which provides drainage and load distribution. A good track requires proper gauge, cross-leveling, alignment, gradient, and resilience to provide a comfortable ride while withstanding forces from train movement and varying temperatures. Wheels are coned rather than flat to reduce wear on flanges and rails and allow for lateral movement.
Bridges: Classification of bridges – with respect to construction
materials, structural behavior of super structure, span, sub structure,
purpose. Temporary and movable bridges. Factors affecting site
selection. Various loads/stresses acting on bridges. Bridge hydrology –
design discharge, water way, afflux, scour depth, economical span.
Bridge components – foundation, piers, abutments, wing wall, approach,
bearings, floor, girders, cables, suspenders. Methods of erection of
different types of bridges. River training works and maintenance of
bridges. Testing and strengthening of bridges. Bridge architect.
The document discusses limit state design of reinforced concrete structures. It introduces limit states as conditions where the structure becomes unfit for use, including limit states of strength and serviceability. Limit state design involves characterizing loads and resistances as random variables and using partial safety factors on loads and resistances to achieve a target reliability. The document outlines the general principles of limit state design according to Indian Standard code IS 800, including defining actions, factors governing strength limits, and serviceability limits related to deflection, vibration and durability.
Prestressed concrete ,post tensioning ,pre tensioning, where normal concrete can not be used and need of more strength is required this type of concrete are used. Metal bars are replaced by the tendoms which are generally used to create tension in concrete. So because of that beam bends in upward direction and when load is applied it come in normal conditon.
The document discusses the design and construction of a 4-lane 90m railway over bridge in Chand Sarai, Lucknow. Key steps in the construction process include surveying, engineering design, laying pile foundations, installing bearings and girders, shuttering, and concreting. Tests were conducted on materials and foundations to ensure quality. The bridge was designed to allow road traffic to safely pass over the railway line.
WBM roads are low-cost roads made of crushed stone aggregates that are mechanically interlocked and bound with water. The aggregates are spread and rolled to form the wearing surface. WBM roads can be used as a base course for bituminous or concrete roads. They have a thickness ranging from 8-30 cm and a camber of 2.5-3%. Construction involves preparing the subgrade, laying the base course and intermediate layers, and forming the wearing surface. Rolling is used to compact the layers and requires sprinkling water while rolling over 80 passes.
Bridge bearings allow for controlled movement between the bridge deck and piers/substructure. The earliest bearings were metal sliding or roller bearings, while modern bridges primarily use elastomeric bearings made of rubber. Elastomeric bearings are advantageous as they require little maintenance, easily accommodate multi-directional movement, are inexpensive, and can absorb vibrations. Proper selection and design of bearings is important for transferring loads while preventing excessive stresses in the bridge structure from temperature changes, traffic, or seismic activity.
Bridge bearings are structural devices installed between bridge substructures and superstructures. They transfer loads while allowing for movement. There are two main types: expansion bearings, which allow translational and rotational movement, and fixed bearings, which allow limited translational and rotational movement. Common bearing types include sliding, rocker and pin, roller, elastomeric, curved, pot, and disk bearings. Each has distinct structures, materials, and abilities to accommodate different load types and movements. Regular inspection and maintenance are important due to risks of corrosion and damage over time.
Bridge bearings allow movement of the bridge superstructure and transfer forces between the superstructure and substructure. Common early bridge bearings included pin, roller, rocker, and sliding metal bearings. Pin bearings allow rotation through a central steel pin but not translation. Roller bearings use rollers to allow longitudinal movement while restricting lateral and rotational movement. Rocker bearings facilitate both rotation and translation. Sliding bearings use metal plates sliding against each other to accommodate translation. Modern bearings also include pot, elastomeric, laminated elastomeric, and lead-rubber bearings.
This document provides a review of bridge bearings. It begins with an introduction to bridges and discusses how earthquakes can damage bridges. It then discusses the importance of bridge bearings, which provide a resting surface between the bridge pier and deck, in resisting earthquakes as they are vulnerable components.
The document reviews the various types of bridge bearings, including elastomeric pads, pot bearings, sliding surfaces using lubricated bronze or PTFE, and curved sliding surfaces like spherical or cylindrical bearings. It also discusses the behavior and properties of each type. Finally, it provides a literature review summarizing previous research conducted on modeling and analyzing the seismic performance of bridges using different types of isolation bearings. In general,
Base isolation system consists of isolation units with or without isolation components, where: Isolation units are the basic elements of a base isolation system which are intended to provide the aforementioned decoupling effect to a building or non-building structure. Isolation components are the ...
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this presentation shows that the bearing of a bridge. what is the type of bearing used? category of bridge describe. know about the significance of bridge. why bearing is essential.
The document provides information about various structural elements including gusset plates, cleats, base plates, column splices, stanchions, high-strength friction grip bolts, trusses, and north light trusses. It defines each element and describes their common uses. Gusset plates connect beams and columns, cleats provide support or strength, and base plates distribute loads from columns. Stanchions are vertical supports used for crowd control. High-strength friction grip bolts provide rigid connections. Trusses transfer loads through tension and compression members, and different truss types cover various spans. North light trusses maximize natural lighting through north-facing glazing.
Bridge bearings are used to transfer forces from the superstructure to the substructure while allowing movements. Traditional bearings included pin, roller, rocker, and sliding metal bearings. Pin bearings allow rotation but not translation. Roller bearings allow longitudinal movement and restrict lateral and rotational movement using gearing. Rocker and pin bearings are used in steel bridges as they accommodate both rotational and translational movements. Sliding bearings use low-friction materials like PTFE to allow translation. Modern bearings include pot, laminated elastomeric, lead-rubber, and plain elastomeric bearings. AASHTO guidelines provide criteria for selecting suitable bearings based on required movements and load resistances
1. Base isolation is a seismic protection technique where structures are supported by flexible bearing pads placed between the building and its foundation. This allows the building to move independently of the ground during an earthquake and reduces the forces transferred to the structure.
2. Common types of base isolation bearings include lead-rubber bearings and high-damping rubber bearings. Lead-rubber bearings consist of alternating layers of rubber and lead that provide flexibility and energy dissipation. High-damping rubber bearings use rubber with added fillers to increase inherent damping.
3. A hybrid bearing called a lead high-damping rubber bearing combines the initial rigidity of a lead plug with the continuous energy dissipation of
This document discusses Indian standards related to piles and provides information on various types of piles. It covers piles categorized by standards, material, installation method, load carrying characteristics, and testing methods. The key points are:
- It outlines Indian standards for different types of piles including concrete, timber, and pile testing.
- Piles are classified by material as concrete, steel, timber, or composite piles made of two materials.
- Installation methods include displacement piles driven into soil and replacement piles where soil is removed.
- Piles carry loads through end bearing, friction along the pile, or a combination depending on the soil conditions.
- Pile load tests directly measure a pile's capacity and
The document discusses different types of foundations and piles used in construction projects. It describes shallow foundations that are at ground level and deep foundations like piles and piers that extend below the surface into stronger soil layers. It outlines various pile types including timber, concrete, steel, and composite piles. For each pile type, it provides details on materials, advantages, disadvantages, installation methods, and factors to consider in selection. The document is an informative overview of foundation and pile foundation options for structural support.
This document provides an overview of pile foundations, including different types of piles classified by material, length, orientation, and installation method. Piles transfer structural loads to deeper firm soil layers when the top soil is loose, soft, or swelling. Piles are long slender columns that can be driven, bored, or cast in place using materials like concrete, steel, or timber. Driven piles compact the surrounding soil to increase capacity, while cast-in-place piles are constructed by drilling holes and filling with concrete to avoid disturbing soil. The document discusses advantages and disadvantages of different pile types.
This geology report discusses different types of foundations and piles used in construction. It describes prefabricated driven piles that increase load capacity through soil compression during driving. Piles are often connected by pile caps to distribute larger loads. Monopiles, drilled shafts, under-reamed piles, micropiles, tripod piles, sheet piles, suction piles, adfreeze piles, and stone columns are also summarized. Reinforcement requirements for different pile types are outlined. Piles are classified based on material as timber, steel, prestressed concrete, or composite piles.
PILE FOUNDATION and METHODS OF INSTALLING PILE FOUNDATIONSShivananda Roy
This document discusses pile foundations and methods of installing pile foundations. It defines pile foundations as slender columns made of materials like concrete or steel that support structures by transferring loads to deeper soil layers through end bearing or skin friction. It then describes different types of piles (e.g. sheet piles, load bearing piles, end bearing piles, friction piles) and materials used (e.g. timber, steel, precast concrete, cast-in-place concrete). The document proceeds to discuss various pile installation methods like dropping weight, vibration, jetting, and boring. It concludes by describing common pile driving equipment used such as piling rigs, winches, hammers, and protective gear placed on pile heads.
Piles can be classified based on use or material. Based on use, they are sheet piles or load bearing piles. Sheet piles retain or support earth, while load bearing piles transmit structural loads. Load bearing piles include timber, concrete, steel, and composite piles. Concrete piles are either precast or cast-in-place. Precast piles are manufactured off-site and cast-in-place piles are constructed on-site. Proper hammer selection and driving techniques are needed to install piles without damaging them or overstressing the soil.
This document discusses bridge bearing pads and expansion joints. It provides details on:
1. The types of bridge bearings including elastomeric bearings, steel bearings, and pot bearings. It describes the purpose, design considerations, and testing methods for bearings.
2. A worked example showing how to design an elastomeric bearing pad.
3. The sources and calculation of movements in bridges that bearings and expansion joints must accommodate.
4. The types and design of expansion joints used in bridges including considerations for the range of movement, loads, and compatibility with bearings.
A truss is a structure composed of straight members arranged in a triangular pattern and connected at their ends to form a rigid framework. Trusses are commonly used in buildings to support roofs and floors over long spans. They provide strength and support loads using less material than beams. Common types of trusses include Pratt trusses and lattice girders, which are used to support trusses running perpendicular. Trusses are fabricated from rolled steel sections or built-up sections and connected by bolting, welding, or riveting. They are an economical choice for supporting large loads and spans in industrial and commercial buildings.
Satyajit Sahoo's document discusses bridge bearings. It defines bearings as structural devices that transmit loads between a bridge's superstructure and substructure while accommodating movements. It describes fixed bearings that allow rotation but restrict translation, and expansion bearings that allow both. The document outlines bridge bearings' functions of load transmission and movement accommodation. It discusses the types of movements bearings experience and explains sliding, roller, and neoprene bearings. Maintenance recommendations include power washing steel components annually and keeping bearings clear of dirt.
Pile foundation are essential in case where SBC is low or the load coming from superstructure is too heavy,
Topics covered includes Materials used for making piles, Type of piles, load transfer mechanism, factors affecting selection of piles, Installation methods, load carrying capacity of piles, different load tests performed and the behavior of piles as a group.
Online train ticket booking system project.pdfKamal Acharya
Rail transport is one of the important modes of transport in India. Now a days we
see that there are railways that are present for the long as well as short distance
travelling which makes the life of the people easier. When compared to other
means of transport, a railway is the cheapest means of transport. The maintenance
of the railway database also plays a major role in the smooth running of this
system. The Online Train Ticket Management System will help in reserving the
tickets of the railways to travel from a particular source to the destination.
Impartiality as per ISO /IEC 17025:2017 StandardMuhammadJazib15
This document provides basic guidelines for imparitallity requirement of ISO 17025. It defines in detial how it is met and wiudhwdih jdhsjdhwudjwkdbjwkdddddddddddkkkkkkkkkkkkkkkkkkkkkkkwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwioiiiiiiiiiiiii uwwwwwwwwwwwwwwwwhe wiqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq gbbbbbbbbbbbbb owdjjjjjjjjjjjjjjjjjjjj widhi owqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq uwdhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhwqiiiiiiiiiiiiiiiiiiiiiiiiiiiiw0pooooojjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj whhhhhhhhhhh wheeeeeeee wihieiiiiii wihe
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Sri Guru Hargobind Ji - Bandi Chor Guru.pdfBalvir Singh
Sri Guru Hargobind Ji (19 June 1595 - 3 March 1644) is revered as the Sixth Nanak.
• On 25 May 1606 Guru Arjan nominated his son Sri Hargobind Ji as his successor. Shortly
afterwards, Guru Arjan was arrested, tortured and killed by order of the Mogul Emperor
Jahangir.
• Guru Hargobind's succession ceremony took place on 24 June 1606. He was barely
eleven years old when he became 6th Guru.
• As ordered by Guru Arjan Dev Ji, he put on two swords, one indicated his spiritual
authority (PIRI) and the other, his temporal authority (MIRI). He thus for the first time
initiated military tradition in the Sikh faith to resist religious persecution, protect
people’s freedom and independence to practice religion by choice. He transformed
Sikhs to be Saints and Soldier.
• He had a long tenure as Guru, lasting 37 years, 9 months and 3 days
Sachpazis_Consolidation Settlement Calculation Program-The Python Code and th...Dr.Costas Sachpazis
Consolidation Settlement Calculation Program-The Python Code
By Professor Dr. Costas Sachpazis, Civil Engineer & Geologist
This program calculates the consolidation settlement for a foundation based on soil layer properties and foundation data. It allows users to input multiple soil layers and foundation characteristics to determine the total settlement.
An In-Depth Exploration of Natural Language Processing: Evolution, Applicatio...DharmaBanothu
Natural language processing (NLP) has
recently garnered significant interest for the
computational representation and analysis of human
language. Its applications span multiple domains such
as machine translation, email spam detection,
information extraction, summarization, healthcare,
and question answering. This paper first delineates
four phases by examining various levels of NLP and
components of Natural Language Generation,
followed by a review of the history and progression of
NLP. Subsequently, we delve into the current state of
the art by presenting diverse NLP applications,
contemporary trends, and challenges. Finally, we
discuss some available datasets, models, and
evaluation metrics in NLP.
Cricket management system ptoject report.pdfKamal Acharya
The aim of this project is to provide the complete information of the National and
International statistics. The information is available country wise and player wise. By
entering the data of eachmatch, we can get all type of reports instantly, which will be
useful to call back history of each player. Also the team performance in each match can
be obtained. We can get a report on number of matches, wins and lost.
2. Bearings are important elements
in large infrastructures such as
bridges, heavy buildings and high
rise buildings, ensuring load
transfer, movement, rotation,
vertical or horizontal restraints as
required by the design at critical
locations in a structure
3. Bridge Bearings are structural devices
positioned between the bridge
superstructure and the substructure.
Their principal functions are as follows:
1. To transmit loads from the
superstructure to the substructure
2. To accommodate relative movements
between the superstructure and the
substructure.
5. Translations ( both transverse and
longitudinal directions ) caused by
Creep, shrinkage and temperature
effects
Rotations caused by Traffic
loading, Construction tolerances
and uneven settlement of the
foundation
6. Until the end of the 18th century all
structures of any appreciable size
were built of stone, brick or mixed
masonry. These structures, generally
massive, are little affected by
environmental changes and any slight
movements which may occur are
compensated either by deformation
of the constituent materials or by
small displacement of the supports.
7. In the 19th century, with introduction of cast iron and
steel larger structural spans accompanied by lightening
of the structure which becomes-more slender and
flexible and loses some of the thermal inertia. They must
then be fitted at their support points with simple
devices, called bearings, which can withstand movement
and, more particularly, the expansion or contraction due
to temperature changes.
8. Rail Bridge that connects Piermont, NY (Hudson River) to Dunkirk.
9. Bearings used at that time were metal plates
sliding one on the other or, of rollers or, of a
combination of both. They were gradually
improved by incorporation of swivel
arrangements to provide rotational movements
11. In 20th century, RCC structures developed but, initially they were
as massive as masonry with little significant support
movements.
But at the end of Second World War the necessity of rebuilding
rapidly the structures favored the rapid development of
reinforced concrete and, even more so, of Pre-stressed concrete.
Structures which were more and more slender, needed bearing
devices to allow for movements and rotations
12. Bearings
Fixed Bearings Expansion Bearings
Allow rotations but
restrict translational
movements
Allow both rotational
and translational
movements
13. 1313
A sliding bearing utilizes one plane metal
plate sliding against another to
accommodate translations.
The sliding bearing surface produces a
frictional force that is applied to the
superstructure, the substructure, and the
bearing itself.
To reduce this friction force, PTFE
(Polytetrafluorethylene) is often used as a
sliding lubricating material.
14. Sliding bearings can be used alone or more often used
as a component in other types of bearings.
Pure sliding bearings can only be used when the
rotations caused by the deflection at the supports are
negligible.
They are therefore limited to a span length of 15 m or
less by ASHTTO.
A guiding system may be added to a sliding bearing to
control the direction of the movement.
16. A rocker bearing is a type of expansion bearing that comes in a
great variety.
It typically consists of a pin at the top that facilitates rotations,
and a curved surface at the bottom that accommodates the
translational movements
Rocker and pin bearings are primarily used in steel bridges.
17. The moment and lateral forces induced from the movement of
these bearings are very small and negligible.
However, metal bearings are susceptible to corrosion and
deterioration. A corroded joint may induce much larger forces.
Regular inspection and maintenance are, therefore, required.
18. 1818
Roller bearings are composed of
one or more rollers between two
parallel steel plates.
Single roller bearings can
facilitate both rotations and
translations in the longitudinal
direction, while a group of rollers
would only accommodate
longitudinal translations.
19. Single roller bearings are relatively cheap to manufacture, but
they only have a very limited vertical load capacity.
Multiple roller bearings, on the other hand, may be able to
support very large loads, but they are much more expensive.
Like rocker and pin bearings, roller bearings are also
susceptible to corrosion and deterioration. Regular inspection
and maintenance are essential.
21. 2121
Bearings are formed of horizontal layers of synthetic
or natural rubber in thin layers bound between steel
plates.
These bearings are capable of supporting high
vertical loads with very small deformations.
These bearings are flexible under lateral loads.
Steel plates prevent the rubber layers from bulging.
Lead cores are provided to increase damping capacity
as plain elastomeric bearings does not provide
significant damping.
They are usually soft in horizontal direction and hard
in vertical direction.
22. 2222
It consist of a laminated elastomeric bearing equipped
with a lead cylinder at the center of the bearing.
The function of the rubber-steel laminated portion of
the bearing is to carry the weight of the structure and
provide post-yield elasticity.
The lead core is designed to deform plastically, thereby
providing damping energy dissipation.
Lead rubber bearings are used in seismically active areas
because of their performance under earthquake loads.
23. 2323
A curved bearing consists of two matching
curved plates with one sliding against the
other to accommodate rotations.
The curved surface can be either cylindrical
which allows the rotation about only one axis
or spherical which allows the bearing to
rotate about any axis.
Lateral movements are restrained in a pure
curved bearing and a limited lateral resistance
may be developed through a combination of
the curved geometry and the gravity loads.
24. 2424
To accommodate lateral movements, a PTFE slider must be attached to the
bearings.
The lower convex steel plate that has a stainless steel mating surface is recessed in
the masonry plate.
The upper concave plate with a matching PTFE sliding surface sits on top of the
lower convex plate for rotations.
Between the sole plate and the upper concave plate there is a flat PTFE sliding
surface that will accommodate lateral movements.
25. 2525
A pot bearing comprises a plain elastomeric
disk that is confined in a shallow steel ring, or
pot. Vertical loads are transmitted through a
steel piston that fits closely to the steel ring
(pot wall).
Flat sealing rings are used to contain the
elastomer inside the pot.
The elastomer behaves like a viscous fluid
within the pot as the bearing rotates.
26. 2626
Because the elastomeric pad is confined, much
larger load can be carried this way than through
conventional elastomeric pads.
Translational movements are restrained in a pure
pot bearing, and the lateral loads are transmitted
through the steel piston moving against the pot wall.
To accommodate translational movement, a PTFE
sliding surface must be used.
Keeper plates are often used to keep the
superstructure moving in one direction.
27. 2727
A disk bearing utilizes a hard elastomeric
(polyether urethane) disk to support the vertical
loads and a metal key in the center of the bearing
to resist horizontal loads.
The rotational movements are accommodated
through the deformation of the elastomer. To
accommodate translational movements, however,
a PTFE slider is required.
In this kind of bearings, the polyether urethane
disk must be hard enough to resist large vertical
load without excessive deformation and yet
flexible enough to accommodate rotations easily.
28. 2828
Loads acting on bearings are calculated and suitable types are decided
For the various qualified bearing alternatives, preliminary designs are performed to
determine the approximate geometry and material properties in accordance with
design specifications.
It is likely that one or more alternatives will be eliminated now because of an
undesirable attribute such as excessive height, oversize footprint, resistance at low
temperature, sensitivity to installation tolerances, etc.
At the end of this step, one or more bearing types may still be feasible and they will
be included in the bid package as the final choices of the bearing types.
29. 2929
Where a simple span deck is supported over rigid supports and the span is less than
7.5m, no special bearing devices are necessary. Only tar paper or a felt layer is
adequate.
For spans betweens 7.5m to about 15m, mild steel plate bearings, sliding type over
free supports and rocking type over the fixed support, may be used.
For spans in excess of 15m, metallic rocker type bearing is provided over the fixed
support and a roller cum rocker type bearing is provided over the free supports.
Alternatively suitably designed laminated neoprene bearings may be provided.
30. 3030
Power-wash steel sliding plates and steel rocker bearings (especially at
abutments) annually when washing decks. Make sure to concentrate efforts
between rocker surfaces and base plates to remove dirt that could accumulate
and impede movement.
Touch up steel with high-quality epoxy paint as needed.
Neoprene bearings require little maintenance except occasional power washing
to keep dirt and debris from building up around bearings
31. 3131
1) Raina VK (1994) , ‘ Concrete Bridge Practice – Analysis, Design and Economics’,
Second edition, Tata McGraw-Hill Publishing Company Limited, New Delhi
2) Standard Specifications and Code of Practice for Road Bridges, Section-1 General
Features of Design (Eighth Revision), IRC-5:2015, Indian Road Congress, New Delhi
3) Bridge Engineering Handbook, CRC Press, New York Washington DC