Figure $9\mathrm{.}27$

Details

Problem $9\mathrm{.}4$ part $($b$)$

After the water table rises to the ground surface, at the bottom of the clay layer

Pore pressure $=$

$l\frac{b}{f}{t}^{{?}^{{?}^{?}}}2$

Total stress $=$

$l\frac{b}{f}{t}^{{?}^{{?}^{?}}}2$

Effective stress $=$

$l\frac{b}{f}{t}^{{?}^{{?}^{?}}}2$

The change in effective stress $($previous effective $-$ new effective stress$)=$

$l\frac{b}{f}{t}^{{?}^{?}}2$

$($Express your answers as integers$).$