$9\mathrm{.}9.$ A $2m$ wide square foundation is placed at a depth of $1\mathrm{.}5m,$ in a very thick homogeneous sand deposit where $q_c=10M\frac{N}{m^2}$ and $=18\mathrm{.}5k\frac{N}{m^3}.$ The stress level at the foundation is $140k\frac{N}{m^2}.$ Estimate the settlement in $25$ years, using the method of Schmertmann et al$.[$Eq$.(9\mathrm{.}30)].$ How much of this settlement is due to creep?

Answer

$S_e=8\mathrm{.}0mm$

Settlement due to creep $=2\mathrm{.}6mm$

The answers are given, i just dont know how to get them.