An highway is being built of a soil whose effective stress shear strength parameter c' and O' are respectively c= 50 kN/m2 and O'= 16 The unit weight of soil 16.2 kN/m .The pore pressure parameter are A= 0.4 and B= 0.92 .The height of highway has just been raised from 5m to 8m. Determine the shear strength of the soil at the base of highway. It can be assumed that lateral pressure at any point is one half the vertical pressures.

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