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Example 2: Results of 
tests conducted on two saturated clay samples are given. Determine the shear strength parameters.
Sample1 Sample2
Confining pressure ---------------- 4.8 kg/cm2 6.3 kg/cm2
Axial stress at failure -------------- 6.8 kg/cm2 9.3 kg/cm2
Pore water pressure at failure --- 3.8 kg/cm2 4.8 kg/cm2
tests conducted on two saturated clay samples are given. Determine the shear strength parameters. Sample1 Sample2
Confining pressure ---------------- 4.8 kg/cm2 6.3 kg/cm2
Axial stress at failure -------------- 6.8 kg/cm2 9.3 kg/cm2
Pore water pressure at failure --- 3.8 kg/cm2 4.8 kg/cm2
Solution:
For sample 1:
For sample 2:
From the plot, one can obtain
