A normally consolidated clay sample, which is fully saturated, was consolidated in the triaxial cell under a particular all-round pressure of σ3. Upon consolidation, drainage valve is closed and σ3 is kept constant while deviatoric stress was gradually increased under undrained condition until failure is reached. The following results are obtained: ½ (σ1 – σ3) = 1/3 σ3 and ½ (σ1′ + σ3′) = 2/3 σ3 Determine pore pressure coefficient Af′ at failure
A normally consolidated clay sample, which is fully saturated, was consolidated in the triaxial cell under a particular all-round pressure of σ3. Upon consolidation, drainage valve is closed and σ3 is kept constant while deviatoric stress was gradually increased under undrained condition until failure is reached. The following results are obtained: ½ (σ1 – σ3) = 1/3 σ3 and ½ (σ1′ + σ3′) = 2/3 σ3 Determine pore pressure coefficient Af′ at failure
Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter12: Shear Strength Of Soil
Section: Chapter Questions
Problem 12.19P
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A normally consolidated clay sample, which is fully saturated, was consolidated in the
triaxial cell under a particular all-round pressure of σ3. Upon consolidation, drainage valve is
closed and σ3 is kept constant while deviatoric stress was gradually increased under undrained
condition until failure is reached. The following results are obtained:
½ (σ1 – σ3) = 1/3 σ3 and ½ (σ1′ + σ3′) = 2/3 σ3
Determine pore pressure coefficient Af′ at failure
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