A consolidated drained triaxial test was carried out on a normally consolidated clay specimen, and the following results were recorded ' 3 150 kN m 2 and f 260 kN m 2 An identical specimen from the same clay was subjected to a consolidated undrained test with a confining pressure of 150 kN m 2 , an...

Given data Consolidated drained test specimen 1 3 1 150 KNm 2 f 2 ...

A consolidated-drained triaxial test was carried out on a normally consolidated clay specimen, and the following results

Question:

A consolidated-drained triaxial test was carried out on a normally consolidated clay specimen, and the following results were recorded: σ'₃ = 150 kN/m² and Δσ_f = 260 kN/m². An identical specimen from the same clay was subjected to a consolidated-undrained test with a confining pressure of 150 kN/m², and the additional axial stress at failure was 115 kN/m².

a. What is the pore water pressure at failure in this second specimen?

b. What is Skempton’s pore pressure parameter A at failure?

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