(Solved) : Two Identical Specimens Of Soft Saturated Normally Consolidated Clay Were . . .

Two identical specimens of soft saturated normally consolidated clay were consolidated to 150 kPa in a triaxial apparatus. One specimen was sheared drained, and the principal stress difference at failure was 300 kPa. The other specimen was sheared un-drained, and the principal stress difference at failure was 200 kPa. Determine
(a) ∅’ and ∅ total;
(b) U f in the un-drained specimen;
(c) Af in the un-drained specimen;
(d) The theoretical angle of failure planes for both specimens.?

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