20 Undisturbed samples from a normally consolidated clay layer were collected during a field exploration program. Drained triaxial tests showed that the effective friction angle o' = 28°. The unconfined compressive strength, q, of a similar specimen was found to be 148 kN/m'. Determine the pore pressure at failure for the unconfined compression test.

Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Braja M. Das, Nagaratnam Sivakugan
Chapter10: Shear Strength Of Soil
Section: Chapter Questions
Problem 10.23P
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Please answer 12.20

12.20 Undisturbed samples from a normally consolidated clay layer were collected
during a field exploration program. Drained triaxial tests showed that the effective
friction angle d' = 28°. The unconfined compressive strength, q, of a similar
specimen was found to be 148 kN/m?. Determine the pore pressure at failure for
the unconfined compression test.
Transcribed Image Text:12.20 Undisturbed samples from a normally consolidated clay layer were collected during a field exploration program. Drained triaxial tests showed that the effective friction angle d' = 28°. The unconfined compressive strength, q, of a similar specimen was found to be 148 kN/m?. Determine the pore pressure at failure for the unconfined compression test.
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