Q$.4.$

A mat $15m20m$ shown in the figure below carries a building load of $600$ bearing at a depth of $7$ m $.$

$($a$)$ What is the percentage of compensation?

$($b$)$ Calculate the settlement of the mat due to the consolidation of the clay.

Treat the clay layer as one layer. Use $2$:$1$ method to find the stress increment.

$($c$)$ Based on $($b$),$ what is the final thickness and final void ratio of the clay?

Dense Sand:

$=18k\frac{N}{m^3}$;$,{}_{\text{s}\text{a}\text{t}}=19\mathrm{.}5k\frac{N}{m^3}$