The parameters of a soil are λ = 0.2, κ = 0.04, f¢cs =30°, eo = 1.08 at p¢o = 80 kPa and Ro = 7. If the soil were to be loaded so that its total stress path q/p = 2.5, predict the following. Initial yield stresses, under undrained condition. Excess pore water pressure at yield for undrained condition. The undrained shear strength at initial yield. A stress path along which the soil may not fail in drained condition.

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The ground conditions at a site are shown in the figure below GL Sand Water table is at ground level = 20% 5 m %3D Water content Specific gravity of solids = 2.7 Unit weight of water = 10kN/m a) The saturated unit weight of the sand (kN/m³) is (a) 15 (b) 18 (c) 21 (d) 24 B) The total stress, pore water pressure and effective stress (kN/m2) at the point P (a) 75, 50 and 25 (b) 90, 50 and 40 (c) 105, 50 and 55 (d) 120, 50 and 70 a0081

Adry sand is known to have an angle of internal friction equal to 36°. A triaxial test is planned, where the confining pressure will be 40 kPa. What maximum axial stress (major principal stress) should be predicted?

A consolidated-undrained test on a normally consolidate clay yield the following results: Confining Pressure = 155 KPa; Deviator Stress = 180 KPa; Pore Pressure m 79 KPa. Calculate the normal stress at the failure plane at drained condition in KPa.