$13$

Determine the ultimate load capacity $(Q_n)$ for the shown pile that is constructed in clay soil knowing that the cross section of pile is square.

Use $$ method to find the skin resistance of pile $(Q_8).$

Silty clay

$=17\mathrm{.}2k\frac{N}{m^3}$

$c_u=20k\frac{N}{m^2}$

Silty clay

${}_{stt}=18\mathrm{.}3k\frac{N}{m^3}$

$c_4=50k\frac{N}{m^2}$