Question $9$

$8/8$ pts

The average effective stress in a normally consolidated clay layer will be reduced from $1800$ psf to $1000$ psf due to a proposed excavation above it$.$ The normally consolidated clay layer is $6$ ft thick with an initial void ratio of $0\mathrm{.}9,$ compression index $($Cc$)$ of $0\mathrm{.}20,$ and recompression$/$swell index $($Cs$)$ of $0\mathrm{.}05.$ Determine the anticipated heave $($i$.$e$.$ how much in increases in height$)$ of the clay layer due to the unloading $($in inches$).$