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A drained triaxial test is conducted on a soil with friction angle of 25° and zero...

A drained triaxial test is conducted on a soil with friction angle of 25° and zero cohesion, using a chamber pressure sc=300 kPa and a back pressure (this is the term used to denote the initial value of the pore pressure, u0) equal to 200 kPa. The shear stage of the test is performed DRAINED by increasing the axial stress s1, while concurrently decreasing the chamber pressure s3 so that their sum remains constant (s1+s3 = constant). Draw the effective and total stress Mohr circles at failure and calculate s1, s3, s1 ’ , s3 ’ , and s1-s3 at failure. Summarize all values in a table to receive credit.

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