Homeworks of chapter 5 2.The effective stress parameters for a fully saturated clay are known to be c= 15 kN/m² and o'=30° . In an unconsolidated- undrained triaxial test on a specimen of the same clay the all-round pressure was 100 kN/m² and the principal stress difference at failure 170 kN/m?. Assuming that the above parameters are appropriate to the failure stress state of the test, what would be the expected value of pore water pressure in the specimen at failure?

Homeworks of chapter 5 2.The effective stress parameters for a fully saturated clay are known to be c= 15 kN/m² and o'=30° . In an unconsolidated- undrained triaxial test on a specimen of the same clay the all-round pressure was 100 kN/m² and the principal stress difference at failure 170 kN/m?. Assuming that the above parameters are appropriate to the failure stress state of the test, what would be the expected value of pore water pressure in the specimen at failure?

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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A 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.
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