Example 1: For the soil deposit shown below, draw the total stress, pore water pressure and effective stress diagrams.The water table is at ground level.



Solution:

Total stress
At - 4m, = 1.92 x 4 = 7.68

At -11m, = 7.68 + 2.1 x 7 = 22.38

Pore water pressure
At - 4 m, u = 1 x 4 = 4
At -11 m, u = 1 x 11 = 11

Effective stress
At - 4 m , = 7.68 - 4 = 3.68
At -11m , = 22.38 - 11 = 11.38