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Coarse Fraction <br />Effective Friction Angle, (p <br />*Taken from greatest Principal. Stress Ratio of each series <br />Confining <br />Pressure <br />1000 PSF <br />(Sample C) <br />Confining <br />Pressure <br />7500 PSF <br />(Sample B) <br />Confining <br />Pressure <br />15000 PSF <br />(Sample A) <br />w <br />a <br />ti <br />?I <br />w <br />a <br />1r <br />w <br />w <br />a? <br />37.0° = (p <br />ctive Normal Stress, a (PSF) <br />a3'= 1605 PSF <br />at' = 6453 PSF <br />iff= 1936 PSF* <br />*max. shear stress at failure plane occuring <br />at 45° + c)/2 from the initial effective <br />consolidation stress of a3' - Vick (1990) <br />37._1° = (p <br />Effective Normal Stress, a (PSF) <br />a3'= 4112 PSF <br />al' = 16628 PSF <br />iff = 4990 PSF* <br />*max. shear stress at failure plane occuring <br />at 45° + N/2 from the initial effective <br />consolidation stress of a3'- Vick (1990) <br />37..5° = T <br />Effective Normal Stress, a (PSF) <br />a3'= 6874 PSF <br />al'= 28238 PSF <br />iff = 8477 PSF* <br />*max. shear stress at failure plane occuring <br />at 45° + 9/2 from the initial effective <br />consolidation stress of a3' - Vick (1990)