Question

q1) 2 vare tests are carried out at vare dimensions d: 100 mm h: 200 mm compute undrained shear strenght value and plot depth vertical axis. the torque measured at 5.0 m depth as the residual value is 720 Nm. find the sensitivity.

DEPTH(M) TORQUE(Nm)

3 700

5 1100 q

2) 6x6 m d = 3.0 m will be designed in the soil given in q1. total load inclding the weight of the footing 100 00 kN the total thickness of the clay layer is 15 m starting from the surface. below there is dense sand for clay &n= 19 kN/m3. Su taken from q1, 6round water level is at 15.0 m determine gross and net foundation pressures.

q3) calclate the factor of safety of the foundation against complete shear failure under undrained condition.(use terzaghi approach)

q4)ıf ground water level raises to the level of 2m below surface what will be s.f.?

Answer 1