Refer to Figure $12\mathrm{.}42.$ Given: $H_1=2\mathrm{.}5m,H_2=2\mathrm{.}5m,H_3=3m,$ and $=100k\frac{N}{m^2}.$ Also,

Sand: $e=0\mathrm{.}64,G_s=2\mathrm{.}65$

Clay: $e=0\mathrm{.}9,G_s=2\mathrm{.}75,LL=55$

Given: $c_v=2\mathrm{.}8{10}^{-6}\frac{m^2}{m}in$ How long will it take for $60\%$ consolidation to occur?

ater table