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Slimes Fraction <br />Effective Friction Angle, cD <br />*Taken from greatest Principal Stress of each series <br />Confining <br />Pressure <br />1000 PSF <br />(Stage 1) <br />Confining <br />Pressure <br />7500 PSF <br />(Stage 2) <br />Confining <br />Pressure <br />15000 PSF <br />(Stage 3) <br />a <br />N <br />v? <br />37.,60 = (p <br />Effective Normal Stress, a (PSF) <br />o3'= 338 PSF <br />al'= 1397 PSF <br />iff = 419 PSF* <br />*max. shear stress at failure plane occuring <br />at 45° + of/2 from the initial effective <br />consolidation stress of a3' - Vick (1990) <br />w <br />N <br />C3 <br />r <br />Is. <br />N <br />r <br />U. <br />31.90= gyp <br />active Normal Stress, a (PSF) <br />(53'= 2402 PSF <br />al'= 7787 .PSF <br />off= 2286 PS.F* <br />*max. shear stress at failure plane occuring <br />at 45° + T/2 from the initial effective <br />consolidation stress of a3' - Vick (1990) <br />32.40 = cp <br />Effective Normal Stress, a (PSF) <br />(73'= 4733 PSF <br />(51' = 15602 PSF <br />rff = 4596 PSF* <br />*max. shear stress at failure plane occuring <br />at 45° + ep/2 from the initial effective <br />consolidation stress of a3'- Vick (1990)