1. A series of direct shear tests was performed on a soil sample. Each test was carried out until thespecimen sheared (failed). The laboratory data for the tests are tabulated as followsSpecimen No.Normal Stress (Kpa)Shearing Stress (Kpa)1200450400520360059041000730а.Compute the cohesion of soilb. Compute the angle of internal frictionc. Compute the shear strength of the soil at a depth of 4 m. below the ground surface if it hasa unit weight of 15.8 KN/cu.m

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Answered: 1. A series of direct shear tests was…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question 8 (1) - Oedometer test What are the boundary conditions applied to a soil sample tested in an Oedometer? Z H a) Pore water pressure at z = H (top of the sample) is PH = Yw. H b) Ez = Ex c) &z=&v (₂ is the volumetric strain of the sample) d) At time t=0, 4p = 0
Please provide correct answer
Final answer. 0.288 in
Question 15 A consolidated-undrained tri-axial test was conducted on a normally consolidated clay sample and the results are as follows: Chamber confining pressure = 109 kPa, Deviator stress at failure = 98 kPa, Pore Water Pressure = 53 kPa. These results were used to determine the drained friction angle of the soil. Compute the deviator stress (kPa) at failure when the drained test was conducted with the chamber confining pressure changed to 151 kPa. Round off to two decimal places.
To determine the strength properties of a clay soil, a series of consolidated–undrained direct shear tests is performed. For the first test, the normal pressure is 36 kPa and the sample fails when the shear stress is 21.6 kPa. The second sample is tested under a normal load of 72 kPa, and failure occurs when the shear stress is 24 kPa. A third sample is tested under a normal loading of 120 kPa, and failure occurs when the shear stress is 38.4 kPa. From these data, estimate the cohesion of the soil in the in situ condition and the value of fCU.
A sand sample is subjected to direct shear testing at it's (in - situ) water content. Two tests are performed. For one of the tests, the sample shears at a stress of 400 kPa when the normal stress is 600 kPa. From these data,Determine the value of the apparent cohesion. Determine the corresponding angle of internal friction.
A triaxial compression test was conducted on a saturated soil sample to determine its shear strength parameters: effective cohesion (C') and effective friction angle (O'). The confining pressure used during the test was 30 psi. The deviator stress on the sample at the time of failure was 40 psi. The porewater pressure measured at the time of failure was 5 psi a) The figure below shows the stress conditions on the sample at the time of failure. Provide the values of total stresses, o1 and oz on the sample. Total horizontal stress, o3 (psi) = (Report to the nearest whole number, i.e. no decimals) Total vertical stress, o1 (psi) (Report to the nearest whole number, i.e. no decimals) %3D b) The figure below shows the effective stress Mohr's Circle for the above soil sample at failure. What are the values of effective normal stresses at points A and B?
Shear Strentgh of the soil 2009
q.1Explain the stresses applied to the soil sample during the triaxial test. B) How do we apply confining pressure to the soil specimen during the triaxial test.?
# 3) A sand soil sample is subjected to a direct shear test under a normal load of 185 kPa. The specimen failed when the shear stress reached 100 kPa. If the normal load is increased to 240 kPa, what will be the shear strength of the specimen?
Test 1 amd test 2 are image 1 and image 2
Soil mechanics

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