Principles of Geotechnical Engineering (MindTap Course List)
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 12, Problem 12.7P
To determine

Find the pore water pressure at failure for the unconfined specimen.

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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?
A drained triaxial test was conducted on a normally consolidated clay specimen with a chamber confining pressure of 145 kN/m2. At failure, the deviator stress was 198 kN/m2. Determine the soil friction angle.
A consolidated-undrained triaxial compression test was performed on a normalconsolidated clay sample. During the experiment, the confining pressure was 140 kPa, thedeviator stress was 125 kPa, and the pore water pressure was 75 kPa at the time of failure.According to the information given:i- Find the consolidated-undrained internal friction angle of the clay. ii- Find the drained friction angle of the clay
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