DCP Spec Sheet 16.1
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DCP testing uses portable, lightweight equipment to evaluate soil strength to depths of over 30 feet. The equipment is inserted into holes drilled through pavement or soil and driven down in calibrated blows, with the number of blows to advance the cone 10 cm recorded to indicate soil strength. Multiple DCP tests can be conducted and averaged to assess soil strength over an area.
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Presentation on standard penertation test
The standard penetration test (SPT) is the most frequently used in situ test for geotechnical properties of soil. It provides information on relative density, shear strength, liquefaction potential, and other properties. The SPT involves driving a split spoon sampler into the bottom of a borehole using a 63.5 kg hammer dropped from a height of 760 mm. The number of blows required for each 150 mm of penetration is recorded and used to evaluate soil properties. Factors such as overburden pressure, hammer efficiency, borehole cleaning must be considered when interpreting SPT results.
Skempton's analysis for cohesive soils
Skempton's analysis provides an improved method over Terzaghi's equation for determining the bearing capacity of cohesive soils. For footing depths less than 2.5 times the base width, Skempton showed that the bearing capacity factors in Terzaghi's equation increase with depth. For deeper footings, Skempton provided an alternative equation to calculate the bearing capacity factor for rectangular footings. The ultimate bearing capacity of cohesive soils can then be determined using the cohesion value.
Plate load test ppt
1. Plate load tests are conducted to determine the ultimate bearing capacity of soil and settlement under a given load by applying loads to circular or square steel plates embedded in an excavated pit.
2. The test setup involves excavating a pit below the depth of the proposed foundation, placing the test plate with a central hole at the bottom, and applying load using a hydraulic jack while measuring settlement.
3. The results provide the subgrade modulus, ultimate bearing capacity divided by a safety factor to determine the safe bearing capacity, and insight into foundation behavior and allowable settlement for design.
Bearing Capacity of Shallow Foundation
This document discusses the cone penetration test (CPT), a method for obtaining direct measurements of soil properties and parameters. It describes the mechanics of the CPT, including the use of a cone penetrometer pushed into soil at a steady rate to measure tip resistance and sleeve friction. The document outlines different types of cones (mechanical, electric, piezocone) and provides examples of how CPT data can be used to characterize soil types and properties with depth and estimate parameters like bearing capacity, shear strength, and settlement. CPT allows accurate profiling of soil stratigraphy and is useful for foundation design, seismic evaluations, and other geotechnical applications.
Plate load test
The document summarizes the plate load test, which determines the ultimate bearing capacity and settlement of soil under a given load. The test involves setting up a steel plate on the soil surface and applying a total load that is divided by the plate area to determine bearing capacity. Testing can be done via gravity or truss methods. Results are interpreted, but the test only reflects soil characteristics to twice the plate depth and doesn't indicate long-term settlements, particularly for cohesive soils. Values may also be conservative for large foundations in dense sands.
cone Penetration test
This document presents information about static cone penetration tests. It discusses the principles and applications of cone penetration testing. The principles section explains that a metal cone is penetrated into the subsurface at a constant rate, and the cone tip resistance, sleeve friction, and friction ratio are recorded to determine soil stratigraphy and properties. The applications section notes that data is used to estimate parameters like undrained shear strength and stress history, and that results can be directly applied to soil profiling and engineering designs.
Bearing capacity of soil
This presentation deals with various methods of determining the various methods of determining the bearing capacity of soil.
Plate load test
Plate load tests are used to determine the ultimate bearing capacity and settlement of soil. The test involves gradually loading a circular or square test plate placed in an excavated pit using a hydraulic jack. Dial gauges measure the settlement under each load increment. A load-settlement curve is generated, allowing engineers to determine the safe bearing capacity based on shear failure or permissible settlement. Results provide insight into foundation design and behavior for the site.
Recommended
Presentation on standard penertation test
The standard penetration test (SPT) is the most frequently used in situ test for geotechnical properties of soil. It provides information on relative density, shear strength, liquefaction potential, and other properties. The SPT involves driving a split spoon sampler into the bottom of a borehole using a 63.5 kg hammer dropped from a height of 760 mm. The number of blows required for each 150 mm of penetration is recorded and used to evaluate soil properties. Factors such as overburden pressure, hammer efficiency, borehole cleaning must be considered when interpreting SPT results.
Skempton's analysis for cohesive soils
Skempton's analysis provides an improved method over Terzaghi's equation for determining the bearing capacity of cohesive soils. For footing depths less than 2.5 times the base width, Skempton showed that the bearing capacity factors in Terzaghi's equation increase with depth. For deeper footings, Skempton provided an alternative equation to calculate the bearing capacity factor for rectangular footings. The ultimate bearing capacity of cohesive soils can then be determined using the cohesion value.
Plate load test ppt
1. Plate load tests are conducted to determine the ultimate bearing capacity of soil and settlement under a given load by applying loads to circular or square steel plates embedded in an excavated pit.
2. The test setup involves excavating a pit below the depth of the proposed foundation, placing the test plate with a central hole at the bottom, and applying load using a hydraulic jack while measuring settlement.
3. The results provide the subgrade modulus, ultimate bearing capacity divided by a safety factor to determine the safe bearing capacity, and insight into foundation behavior and allowable settlement for design.
Bearing Capacity of Shallow Foundation
This document discusses the cone penetration test (CPT), a method for obtaining direct measurements of soil properties and parameters. It describes the mechanics of the CPT, including the use of a cone penetrometer pushed into soil at a steady rate to measure tip resistance and sleeve friction. The document outlines different types of cones (mechanical, electric, piezocone) and provides examples of how CPT data can be used to characterize soil types and properties with depth and estimate parameters like bearing capacity, shear strength, and settlement. CPT allows accurate profiling of soil stratigraphy and is useful for foundation design, seismic evaluations, and other geotechnical applications.
Plate load test
The document summarizes the plate load test, which determines the ultimate bearing capacity and settlement of soil under a given load. The test involves setting up a steel plate on the soil surface and applying a total load that is divided by the plate area to determine bearing capacity. Testing can be done via gravity or truss methods. Results are interpreted, but the test only reflects soil characteristics to twice the plate depth and doesn't indicate long-term settlements, particularly for cohesive soils. Values may also be conservative for large foundations in dense sands.
cone Penetration test
This document presents information about static cone penetration tests. It discusses the principles and applications of cone penetration testing. The principles section explains that a metal cone is penetrated into the subsurface at a constant rate, and the cone tip resistance, sleeve friction, and friction ratio are recorded to determine soil stratigraphy and properties. The applications section notes that data is used to estimate parameters like undrained shear strength and stress history, and that results can be directly applied to soil profiling and engineering designs.
Bearing capacity of soil
This presentation deals with various methods of determining the various methods of determining the bearing capacity of soil.
Plate load test
Plate load tests are used to determine the ultimate bearing capacity and settlement of soil. The test involves gradually loading a circular or square test plate placed in an excavated pit using a hydraulic jack. Dial gauges measure the settlement under each load increment. A load-settlement curve is generated, allowing engineers to determine the safe bearing capacity based on shear failure or permissible settlement. Results provide insight into foundation design and behavior for the site.
Plate load test and its interpretations
This document describes the procedure for conducting a plate load test to determine the bearing capacity of soil. Key details include:
- Plate load tests involve gradually applying load increments to a steel plate placed on the ground and measuring settlement over time.
- Tests are used to determine ultimate bearing capacity and modulus of subgrade reaction for foundation design.
- Proper test setup, equipment, load increments, settlement observations and timing are specified.
- Results are interpreted by plotting load-settlement curves to identify yield point or failure for different soil types.
- Calculations are provided to determine ultimate bearing capacity and expected foundation settlement from plate load test data.
- Limitations include only reflecting shallow soil properties and not fully capturing ultimate
Ex 11 vane shear test
This experiment aims to determine the undrained shear strength of remolded cohesive soil using a vane shear test. The vane shear test involves pushing a four-bladed vane into a soil sample and rotating it until shear failure occurs along a cylindrical surface. The torque required to cause failure is measured and converted to a unit shear resistance. This test is suitable for soft soils where other shear tests may not work accurately, and it can be used to find both the undisturbed and remolded shear strengths to estimate soil sensitivity. The procedure involves filling a container with soil at a set density and water content, inserting the vane, and rotating it until failure while recording the applied torque and calculated shear strength.
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DETERMINATION OF SOIL RESISTANCES:
This document describes two methods for determining soil resistance: the pocket penetrometer test and proving ring penetrometer test. The pocket penetrometer test measures shear strength at various soil depths using a penetrometer, finding strength increases with depth. The proving ring test measures penetration resistance by pressing a cone into soil and reading pressure on a proving ring, obtaining a resistance of around 18 kPa at test depths. Both tests provide a simple way to evaluate soil compaction and trafficability.
Bearing ratio capacity of compacted soil
This document describes the standard test method for determining the California Bearing Ratio (CBR) of laboratory-compacted soils. The CBR test measures the bearing capacity of a soil by penetrating a piston into a compacted soil sample and measuring the resistance. There are two main compaction methods - static and dynamic - and the document outlines the detailed procedures for compacting soil samples using each method and then soaking and testing the samples to determine the CBR value. The CBR test is used to evaluate the strength of materials like subgrade, subbase and base course materials for roads and airfields.
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1. The document discusses various types of shallow foundations including spread footings, combined footings, strap or cantilever footings, and mat or raft foundations.
2. Design of foundations involves determining the safe bearing capacity of soil and proportioning the size, thickness, and reinforcement of footings based on bending moment and shear force calculations.
3. Numerical examples show how to calculate the required width, length, or depth of different footings given soil properties and applied loads using bearing capacity equations.
Plate load test
A plate load test involves applying incremental loads to a bearing plate placed on the ground surface and measuring the resulting settlements. The test is used to estimate the settlement of a footing under working loads. A seating load is first applied and removed, then higher loads are placed and settlements are recorded until the rate of settlement decreases. Load-settlement curves are plotted from the results. The test gives the immediate settlement but not long-term consolidation settlement, so it is not very useful for predicting behavior in clay soils. The test also may not be representative if the soil is not homogeneous to a depth of 1.5-2 times the prototype footing width.
Plate load test
PLATE LOAD TEST
PRESUMPTIVE SAFE BEARING CACACITY
PLATE LOAD TEST APPARATUS / EQUIPMENT
PLATE LOAD TEST PROCEDURE
CALCULATION OF BEARING CAPACITY FROM PLATE LOAD TEST
For vedo link
Https://youtu.be/BUMd7CKcBV8
2)indirect methods
This document discusses various in-situ soil testing methods, including standard penetration tests, cone penetration tests, and dynamic cone penetration tests. It provides details on how each test is performed, how resistances are calculated, and how results correlate with soil type. The document also summarizes seismic refraction and electrical resistivity methods for preliminary site investigations, explaining how each works and limitations of the techniques.
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1. The standard penetration test (SPT) involves driving a split-spoon sampler into the ground using a 63.5 kg hammer dropped from a height of 0.76 m. The number of blows required to drive the sampler over two intervals of 150 mm each is recorded as the SPT N-value.
2. The SPT N-value provides an approximate measure of soil resistance and a disturbed soil sample. It can be used to estimate soil strength parameters and bearing capacity through empirical correlations.
3. However, the SPT is highly dependent on the equipment and operator used, as factors like hammer efficiency, drill rod length, and borehole diameter can affect the N-value. Corrections are required
bearing capacity of multi edge foundations
1) The document is a thesis on numerically analyzing the load-settlement behavior of multi-edge foundations using FLAC3D.
2) It examines the effects of geometry, soil parameters, and element size on the bearing capacity of cross-shaped and H-shaped foundations.
3) The optimal ratios of width to length are determined, which result in the maximum bearing capacity due to blocking effects between shear zones under the foundation.
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The document discusses soil bearing capacity and methods for determining and improving it. It explains that the ultimate and safe bearing capacities must be determined to ensure the foundation can safely transmit loads to the soil. A common field test is the plate load test, which involves loading a test plate in a pit and measuring settlement. From the load-settlement graph, the ultimate capacity is determined using the maximum load. The safe capacity applies a factor of safety, usually 2-3. Methods to improve bearing capacity include increasing foundation depth, draining water, compacting soil, grouting, confinement, and chemical treatment.
case study on plat load test
The document summarizes the plate bearing test procedure. The plate bearing test is conducted to determine the bearing capacity and settlement of soil under shallow foundations or temporary structures. It involves loading a steel plate placed at the foundation level with incremental loads and measuring the corresponding settlement. The test is continued until a settlement of 25mm or more is reached. The results from multiple plate bearing tests are presented in tables showing the pressure, initial and final dial readings, settlement and cumulative settlement at each load increment. The safe bearing capacity of the soil in the test area was determined based on the permissible settlement of 25mm from the plate bearing tests.
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This document discusses bearing capacity theory and failure modes in foundations. It covers several key topics:
- The three common types of bearing capacity failure - general shear, local shear, and punching shear - and the soil conditions that lead to each.
- Factors that influence bearing capacity like soil type, foundation geometry, load eccentricity, groundwater level, and layered soil profiles.
- Methods for calculating bearing capacity using Terzaghi's method and modifications by Vesic and others.
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- Empirical relationships for estimating bearing capacity from in-situ tests like S
Lecture 1. bearing capacity of soil
This document provides an introduction to foundation engineering and different types of foundations. It discusses shallow foundations, which have a depth to width ratio of less than 4, including spread, strip, continuous, combined and raft foundations. It also discusses deep foundations, which have a depth to width ratio greater than 4, such as piles and drilled shafts. The document further explains bearing capacity and settlement criteria for foundations. It provides details on Terzaghi's and Skempton's bearing capacity theories and includes examples of calculating ultimate and allowable bearing capacities.
Evaluation of-cyclic-softening-in-clays
- The document discusses methods for evaluating cyclic softening in clays, specifically focusing on using cone penetration test (CPT) results. It suggests that a plasticity index (PI) greater than 12 defines clay-like behavior.
- For clay-like soils, the undrained shear strength ratio (su/'vc) essentially controls cyclic resistance. When the cyclic stress ratio (CSR) approaches the undrained shear strength ratio, large deformations are likely.
- CPT can be used to estimate undrained shear strength (su) and overconsolidation ratio (OCR) profiles in clay-like soils. Undrained shear strength can be estimated from CPT tip resistance and empirical cone factors ranging from 10
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Plate load test and its interpretations
This document describes the procedure for conducting a plate load test to determine the bearing capacity of soil. Key details include:
- Plate load tests involve gradually applying load increments to a steel plate placed on the ground and measuring settlement over time.
- Tests are used to determine ultimate bearing capacity and modulus of subgrade reaction for foundation design.
- Proper test setup, equipment, load increments, settlement observations and timing are specified.
- Results are interpreted by plotting load-settlement curves to identify yield point or failure for different soil types.
- Calculations are provided to determine ultimate bearing capacity and expected foundation settlement from plate load test data.
- Limitations include only reflecting shallow soil properties and not fully capturing ultimate
Ex 11 vane shear test
This experiment aims to determine the undrained shear strength of remolded cohesive soil using a vane shear test. The vane shear test involves pushing a four-bladed vane into a soil sample and rotating it until shear failure occurs along a cylindrical surface. The torque required to cause failure is measured and converted to a unit shear resistance. This test is suitable for soft soils where other shear tests may not work accurately, and it can be used to find both the undisturbed and remolded shear strengths to estimate soil sensitivity. The procedure involves filling a container with soil at a set density and water content, inserting the vane, and rotating it until failure while recording the applied torque and calculated shear strength.
Bearing capacity theory is code ,vesic ,hansen, meyerhof, skemptons( usefulse...
Bearing capacity theory is code ,vesic ,hansen, meyerhof, skemptons ( usefulsearch.org) (useful search)
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Bearing ratio capacity of compacted soil
This document describes the standard test method for determining the California Bearing Ratio (CBR) of laboratory-compacted soils. The CBR test measures the bearing capacity of a soil by penetrating a piston into a compacted soil sample and measuring the resistance. There are two main compaction methods - static and dynamic - and the document outlines the detailed procedures for compacting soil samples using each method and then soaking and testing the samples to determine the CBR value. The CBR test is used to evaluate the strength of materials like subgrade, subbase and base course materials for roads and airfields.
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2. Design of foundations involves determining the safe bearing capacity of soil and proportioning the size, thickness, and reinforcement of footings based on bending moment and shear force calculations.
3. Numerical examples show how to calculate the required width, length, or depth of different footings given soil properties and applied loads using bearing capacity equations.
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A plate load test involves applying incremental loads to a bearing plate placed on the ground surface and measuring the resulting settlements. The test is used to estimate the settlement of a footing under working loads. A seating load is first applied and removed, then higher loads are placed and settlements are recorded until the rate of settlement decreases. Load-settlement curves are plotted from the results. The test gives the immediate settlement but not long-term consolidation settlement, so it is not very useful for predicting behavior in clay soils. The test also may not be representative if the soil is not homogeneous to a depth of 1.5-2 times the prototype footing width.
Plate load test
PLATE LOAD TEST
PRESUMPTIVE SAFE BEARING CACACITY
PLATE LOAD TEST APPARATUS / EQUIPMENT
PLATE LOAD TEST PROCEDURE
CALCULATION OF BEARING CAPACITY FROM PLATE LOAD TEST
For vedo link
Https://youtu.be/BUMd7CKcBV8
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This document discusses various in-situ soil testing methods, including standard penetration tests, cone penetration tests, and dynamic cone penetration tests. It provides details on how each test is performed, how resistances are calculated, and how results correlate with soil type. The document also summarizes seismic refraction and electrical resistivity methods for preliminary site investigations, explaining how each works and limitations of the techniques.
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1. The standard penetration test (SPT) involves driving a split-spoon sampler into the ground using a 63.5 kg hammer dropped from a height of 0.76 m. The number of blows required to drive the sampler over two intervals of 150 mm each is recorded as the SPT N-value.
2. The SPT N-value provides an approximate measure of soil resistance and a disturbed soil sample. It can be used to estimate soil strength parameters and bearing capacity through empirical correlations.
3. However, the SPT is highly dependent on the equipment and operator used, as factors like hammer efficiency, drill rod length, and borehole diameter can affect the N-value. Corrections are required
bearing capacity of multi edge foundations
1) The document is a thesis on numerically analyzing the load-settlement behavior of multi-edge foundations using FLAC3D.
2) It examines the effects of geometry, soil parameters, and element size on the bearing capacity of cross-shaped and H-shaped foundations.
3) The optimal ratios of width to length are determined, which result in the maximum bearing capacity due to blocking effects between shear zones under the foundation.
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The document discusses soil bearing capacity and methods for determining and improving it. It explains that the ultimate and safe bearing capacities must be determined to ensure the foundation can safely transmit loads to the soil. A common field test is the plate load test, which involves loading a test plate in a pit and measuring settlement. From the load-settlement graph, the ultimate capacity is determined using the maximum load. The safe capacity applies a factor of safety, usually 2-3. Methods to improve bearing capacity include increasing foundation depth, draining water, compacting soil, grouting, confinement, and chemical treatment.
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The document summarizes the plate bearing test procedure. The plate bearing test is conducted to determine the bearing capacity and settlement of soil under shallow foundations or temporary structures. It involves loading a steel plate placed at the foundation level with incremental loads and measuring the corresponding settlement. The test is continued until a settlement of 25mm or more is reached. The results from multiple plate bearing tests are presented in tables showing the pressure, initial and final dial readings, settlement and cumulative settlement at each load increment. The safe bearing capacity of the soil in the test area was determined based on the permissible settlement of 25mm from the plate bearing tests.
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This document discusses bearing capacity theory and failure modes in foundations. It covers several key topics:
- The three common types of bearing capacity failure - general shear, local shear, and punching shear - and the soil conditions that lead to each.
- Factors that influence bearing capacity like soil type, foundation geometry, load eccentricity, groundwater level, and layered soil profiles.
- Methods for calculating bearing capacity using Terzaghi's method and modifications by Vesic and others.
- How to account for load inclination, eccentricity, angular foundation bases, rigidity, and layered soil conditions in calculations.
- Empirical relationships for estimating bearing capacity from in-situ tests like S
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This document provides an introduction to foundation engineering and different types of foundations. It discusses shallow foundations, which have a depth to width ratio of less than 4, including spread, strip, continuous, combined and raft foundations. It also discusses deep foundations, which have a depth to width ratio greater than 4, such as piles and drilled shafts. The document further explains bearing capacity and settlement criteria for foundations. It provides details on Terzaghi's and Skempton's bearing capacity theories and includes examples of calculating ultimate and allowable bearing capacities.
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- For clay-like soils, the undrained shear strength ratio (su/'vc) essentially controls cyclic resistance. When the cyclic stress ratio (CSR) approaches the undrained shear strength ratio, large deformations are likely.
- CPT can be used to estimate undrained shear strength (su) and overconsolidation ratio (OCR) profiles in clay-like soils. Undrained shear strength can be estimated from CPT tip resistance and empirical cone factors ranging from 10
Question and Answers on Terzaghi’s Bearing Capacity Theory (usefulsearch.org)...
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This document summarizes bearing capacity theory for shallow foundations. It defines key terms like ultimate, net ultimate, and safe bearing capacities. It describes Terzaghi's bearing capacity equation, which considers soil shear strength parameters (c, φ), surcharge loads, and bearing capacity factors (Nc, Nq, Nr). It outlines the failure geometry Terzaghi assumed, with five distinct failure zones. It also distinguishes between general shear, local shear, and punching shear failures based on soil properties and characteristics. Empirical modifications are suggested for local shear failures. Charts summarize the bearing capacity equations for different shaped footings based on experimental results.
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This document provides information on three common penetration tests: Standard Penetration Test (SPT), Static Cone Penetration Test (SCPT), and Dynamic Cone Penetration Test (DCPT). It describes the procedures, equipment, corrections, and correlations with engineering properties for each test. The SPT is the most commonly used test and provides data on density and strength. The SCPT gives continuous resistance measurements with depth. The DCPT is fast and inexpensive but resistance values must be correlated to SPT results. Each test has advantages and limitations depending on the soil type and project needs.
Standard Penetration Test
The document summarizes the standard penetration test (SPT), a common in situ geotechnical testing method. It describes the basic procedure, which involves driving a split spoon sampler into subsurface soils using a hammer, and recording the number of blows required for each increment of penetration. Corrections are made to SPT values to account for overburden pressure and dilatancy. Empirical correlations are presented relating SPT values to properties like density, shear strength, and consistency of cohesionless and cohesive soils. Both advantages like being inexpensive and quick, and limitations like lack of precision are discussed.
Structural evaluation of low volume road pavements using pavement dynamic con...
Abstract
Static and dynamic cone penetration tests are widely used in Foundation engineering for measuring the penetration resistance of the
ground and for relating it to the degree of compaction and safe bearing capacity of soils. In Highway Engineering, Pavement
Dynamic Cone Penetrometer (DCP) is used for rapid in-situ strength evaluation of subgrade and other unbound pavement layers. In
the present studies, an attempt has been made to identify the strength and thickness of different pavement layers of newly constructed
low volume roads in the State of Karnataka, India using dynamic cone penetration studies and was compared with actual
measurements at the site. The evaluation of pavement test stretches was made for a period of two years, and changes in penetration
resistance of different pavement layers were measured. A Software was used to analyze the DCP data and to correlate with field
observation. The results have favoured the possibility of using dynamic cone penetrometer as a quality control and pavement
monitoring tool for low volume roads, eliminating the need for a Benkelman beam or a falling weight deflectometer.
Keywords: Pavement Dynamic Cone Penetrometer, CBR, Subgrade, Rural roads
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...eSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and TechnologyIn situ methods vane shear test
This document summarizes in-situ methods for determining soil properties, specifically the vane shear test and pressure meter tests.
The vane shear test directly measures the undrained shear strength of soft clays in the field by inserting a rotating vane and measuring the torque. Pressure meter tests measure the soil's stress-strain response by expanding a membrane probe against the soil and recording the resulting pressures and strains. Self-boring pressure meters can test undisturbed soil by drilling into the ground, while displacement pressure meters push into pre-drilled boreholes. Both provide fundamental soil properties with minimal empirical corrections needed.
Geotechnical testign methods ii as
The document discusses various field and laboratory testing methods for geotechnical investigations. It describes common in-situ tests like the Standard Penetration Test (SPT), Cone Penetration Test (CPT), Dynamic Cone Penetration Test (DCPT), Vane Shear Test (VST), Dilatometer Test (DMT), and Pressuremeter Test (PMT). It also discusses procedures, components, interpretations and limitations of these tests. The document then briefly covers rock testing methods like Unconfined Compression Test, Brazilian Test, Point Load Test, and Schmidt Rebound Hardness Test.
Standard Penetration Test for soils
The document describes the standard penetration test (SPT) method for determining the bearing capacity of soils. SPT involves driving a split spoon sampler into the soil using a 63.5 kg hammer dropped from a height of 75 cm. The number of blows required to penetrate each 150 mm interval is recorded as the N-value. N-values are corrected for overburden pressure and dilatancy. Bearing capacity is then calculated using corrected N-values, soil properties like internal friction angle, and factors for shape, depth, inclination, and water table location. The SPT provides soil strength data and undisturbed samples needed to determine cohesion and friction angle for bearing capacity calculations.
Geotechnical aspects of highway construction
This document discusses using dynamic cone penetration tests (DCPT) to estimate California bearing ratio (CBR) values of soils along a canal in Punjab, India for road construction. Laboratory and field DCPT and CBR tests were conducted on saturated soil samples at various locations. Polynomial equations were developed relating DCPT index to laboratory and field CBR values, allowing quick estimation of soaked CBR from DCPT. The relationships show DCPT can effectively evaluate soil strength for pavement design and quality control along the canal.
FIELD TEST FOR BEARING CAPACITY-revised for BC.pptx
This document discusses various field tests used to determine bearing capacity of soils, including the standard penetration test (SPT), plate load test, cone penetration test (CPT), and pressure meter test. The SPT involves driving a split spoon sampler into the ground using a hammer and measuring the blow counts, while corrections are applied to the observed value. The plate load test applies incremental loads to a steel plate in a pit until a maximum settlement is reached to determine ultimate bearing capacity. The CPT provides continuous measurements of cone resistance with depth to assess soil properties. The pressure meter test measures volume changes in a probe under increasing gas pressure to identify elastic and plastic soil behavior.
Site inveswtigation vandana miss
This document discusses soil exploration methods, including the purpose of soil exploration to determine foundation type and bearing capacity. It describes various investigation methods like probing, geophysical testing, soil borings using augers or wash boring, and sampling techniques to obtain disturbed and undisturbed soil samples. It also discusses determining boring depth and spacing. Methods to evaluate groundwater conditions and field strength tests like the standard penetration test are summarized.
Soil Properties & Testing
The document discusses soil properties testing and investigation methods. It outlines the typical project sequence which includes site research, field reconnaissance, exploration, laboratory investigations, and reporting. Common objectives are to identify surface conditions, determine subsurface soil profiles, locate groundwater, recover samples, and conduct lab/field testing. Field tests discussed include standard penetration testing, cone penetration testing, vane shear testing, and plate load testing. Laboratory tests examine properties like moisture content, density, plasticity, gradation, shear strength, consolidation, and swelling. The results of these investigations and tests are used to evaluate soil bearing capacity and foundation design.
10570216.ppt
The document discusses different types of soil sampling techniques and soil samplers. It describes undisturbed, disturbed and non-representative soil samples and the samplers used to obtain them, including piston, foil and open drive samplers. It also discusses in-situ field testing methods like standard penetration tests and static cone penetration tests. Corrections applied to standard penetration test N-values for overburden pressure and dilatancy are also summarized.
Standard penetration test(spt)
This document describes the standard penetration test (SPT), which is commonly used to evaluate the engineering properties of soils in the field. It discusses the equipment used, including the drilling rig, split spoon sampler, drive weight assembly, and cathead. It outlines the procedures for drilling a borehole, driving the sampler, and handling the recovered soil sample. Corrections are applied to account for factors like overburden pressure and dilatancy. SPT N-values can be used to estimate properties like relative density, friction angle, and unconfined compressive strength. The test provides representative samples and index properties but has limitations for some soil types.
lecture_Exploration.ppt shear strength ppt soil mechanics and ppts
The document discusses various methods for soil exploration including reconnaissance, site visits, borings, test pits, sampling, and testing. It describes core borings, how many are needed and how deep they should be based on the type of structure. The standard penetration test and cone penetration test are explained as ways to determine soil properties. Methods like the vane test are used to determine shear strength of soft clays. Proper report format is also outlined.
Soil penetration tests
This document discusses different types of in-situ soil tests used for subsurface exploration, including penetrometer tests. It describes the standard penetration test (SPT), which involves driving a split-spoon sampler into the soil using blows from a hammer. It also discusses the static cone penetration test (SCPT) and dynamic cone penetration test (DCPT), which measure soil resistance during penetration. SPT values are corrected based on overburden pressure and dilatancy. DCPT can identify soil variability but is not suitable for cohesive soils or depths with rod friction. SCPT and DCPT provide continuous resistance profiles without boreholes.
Sub soil exploration & spt
Its a short presentation on the sub soil exploration.Its just representing the set method of sub soil exploration with its application. For report and abstract you can mail me on darkswagger001@gmail.com
Grounding and bonding testing
This document discusses grounding and bonding testing procedures. It begins with an overview of the key steps: 1) performing an earth (soil) resistivity test, 2) installing the grounding system, and 3) testing the installed system. It then covers details of soil resistivity testing including how to measure resistivity and factors that affect resistivity. The document reviews components of a grounding system including electrodes, conductors, bars and connection methods. It provides guidance on proper installation and inspection of connections. Finally, it stresses the importance of testing the completed system to ensure it is effective.
Insitu and lab test
The Standard Penetration Test (SPT) involves driving a thick-walled sampler into the ground using blows from a hammer. The number of blows required for each 150mm of penetration is recorded. Higher blow counts indicate denser soil. SPT results provide an indication of soil strength properties and relative density, especially in granular soils where undisturbed samples are difficult to obtain. However, SPT results have limitations as the test can disturb soils and the blow count data has low resolution. Correlations are used to interpret SPT results but depend on soil type.
Insitu and lab tests
Application of seismic method (reflected & refractive)
Application of electrical resistivity method
Similar to DCP Spec Sheet 16.1 (20)
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...
Structural evaluation of low volume road pavements using pavement dynamic con...
FIELD TEST FOR BEARING CAPACITY-revised for BC.pptx
FIELD TEST FOR BEARING CAPACITY-revised for BC.pptx
lecture_Exploration.ppt shear strength ppt soil mechanics and ppts
lecture_Exploration.ppt shear strength ppt soil mechanics and ppts
DCP Spec Sheet 16.1
- 1. Dynamic Cone Penetrometer (DCP) Testing On State Contract DCP Testing is a valuable tool for evaluating the strength of subsurface soils to depths of 30 feet or more. DCP Testing has been used in the US for over 15 years to evaluate the strength and bearing capacities of soils beneath pavement systems and building foundations. DCP test equipment is small, lightweight, and portable. It is ideal for use in confined areas (inside a building to evaluate foundation settlement issues), congested areas (near trees, in and around existing structures), and hard to reach areas (on steep slopes or soft surface soils). The equipment is electrically operated and hydraulically actuated, requiring only 110 VAC. DCP Test Procedure: • Utilities must be identified • A 3.81 cm / 1.5 inch diameter hole is drilled through the pavement • 1 Meter rods are inserted in the hole on top of a sacrificial cone • A 30 kg / 66 pound percussive head is used to drive the rods and cone into the soil in a calibrated and consistent manner • The number of percussive blows required to drive the cone and rods into the soil each 10 cm / 3.937 inches is recorded • These blow counts provide an indication of soil strength. The blow counts can be correlated to the N-value associated with the Standard Penetration Test (SPT) by using a relationship developed by the manufacturer: N (SPT) = 0.766 x N (DCP) • The sacrificial cone remains in the soil and the rods are extracted The DCP data is recorded to a spread sheet and graph indicating levels of weak soils. Multiple tests can be grouped together to provide an average N-value for the area. Advanced Materials, LLC ® - P.O. Box 3414, Dublin, OH 43016 – 614-561-6440 – joe@amllc.org