Q$3.$ For a continuous foundation in two$-$layered as shown in Figure $5,$ given:

$B=1\mathrm{.}5m,H=1m,D_f=1\mathrm{.}5m.$

Determine the gross ultimate load per unit length of the foundation $($Use Table $1$ given in

Q$1).$

${}_1=18k\frac{N}{m^3},{}_1^{\text{'}}=40,c_1^{\text{'}}=15k\frac{N}{m^2}$

$v_n=16\mathrm{.}7k\frac{N}{m^3}{k}^{\text{'}}=35c_{-}^{\text{'}}=30k\frac{N}{m^2}$

Figure $3$