Problem $2$: $($Sopve it step by step$)$For the clay layer shown in the figure determine

The stress increase in the middle of the clay layer. $($use $2$:$1$ method$)$

The settlement at the middle of the clay layer, $)=(1\mathrm{.}5.$

What is the degree of consolidation for the clay layer when the settlement is $30mm?$

A field monitoring indicated that after $6$ months the settlement was $20mm,$ estimate the settlement $($in mm $)$ after $5$ years.