Question: A consolidated - undrained ( C U ) triaxial test is conducted on a soil specimen, with total stress cell pressure ( 3 ) of

A consolidated-undrained (CU) triaxial test is conducted on a soil specimen, with total stress cell pressure (3) of 348kPa. The pore water pressure increases from 97kPa (i.e. back pressure) to 231kPa when deviatoric stress (q) increases from 0 to 311kPa. Calculate the mean effective stress (p') in kPa when q=311kPa.
A consolidated - undrained ( C U ) triaxial test

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