1 A shallow foundation supported by a silty sand is shown in the figure below Estimate the elastic settlement of the foundation given Length L 3 m Width B 3 m Depth of foundation D 1 5 m Thickness of foundation t 0 25 m Load per unit area Ao 150 kN m Ef 15 x 106 kN m The silty sand has the following properties H 20 m Mg 0 3 Eo k 400 kN m m 16 000 kN m Compressible soil layer Es s Be A H Rigid layer Eo Depth z NOTE Show all the calculation steps Es Es Eo kz