Principles Of Foundation Engineering 9e
9th Edition
ISBN: 9781337705035
Author: Das, Braja M.
Publisher: Cengage,
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Chapter 2, Problem 2.20P
To determine
Find the pore water pressure within the specimen.
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In a drained triaxial compression test, a saturated specimen of cohesionless sand fails at a deviator stress of 450 kN/m2 when the cell pressure was 135 kN/m2. Find the angle of inclination of the failure plane with the horizontal. Show diagram
A saturated specimen of cohesionless sand was tested under drained conditions in a triaxial compression test apparatus and the sample failed at a deviator stress of 482 kN/m2 and the plane of failure made an angle of 60° with the horizontal. Find the magnitude of the principal major stress in kPa.
A drained triaxial test on a normally consolidated clay showed that the failure plane makes an angle of 58° with the horizontal. If the sample was tested with a chamber confining pressure of 103.5 kN/m^2, what was the major principal stress at failure?
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Principles Of Foundation Engineering 9e
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- A consolidated-undrained triaxial test was conducted on a dense sand with a confining pressure of 138 kN/m2. Results showed that ϕ′=24 deg and ϕ=31 deg. Determine the deviator stress and the pore water pressure at failure.arrow_forwardFor the given problem, the failure plane was inclined at an angle of 35° with the vertical to find the cohesion of the soil for an unconfined cylindrical specimen of clay fails under an stress of 240kN/m^2arrow_forwardData from an oedometer test using a clay specimen are plotted in the graph shown below. If the compression index is equal to 0.6, calculate the void ratio (e2) missing at Point C, which is associated with a vertical effective stress equal to 105 kPaarrow_forward
- Following are the results of consolidated-undrained triaxial tests on undisturbed soils retrieved from a 4-m thick saturated clay layer in the field (sat = 20.7 kN/m3). a. Estimate graphically the Mohr-Coulomb shear strength parameters c' and '. b. Estimate the shear strength in the middle of the clay layer.arrow_forwardA saturated specimen of cohesionless sand was tested under drained conditions in a triaxial compression test apparatus and the sample failed at a deviator stress of 482 kN/m2 and the plane of failure made an angle of 60° with the horizontal. Find the magnitude of the principal minor stress in kPa at failure for identical specimen of sand if it is tested under a cell pressure of 200 kPa. a.600 b.241 c.723 d.200arrow_forwardA clay specimen with drained shear strength parameters of c'=5 kPa and Φ=320 is consolidated under all around pressure of 140 kPa.The specimen was then loaded axially to failure under undrained condition and failed when the principal stress diffrences reached 60 kPa.Calculate the pore pressure(u) and the pore pressure coefficient D(=A*B=Δu/Δσv) of the clay.arrow_forward
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