Example 3.1 A square foundation is 1.5m x 1.5m in plan. The soil supporting the foundation has a friction angle ǿ = 20o, & c’=15.2 kN/m2. The unit weight of the soil, ץ, is 17.8 kN/m3. Determined the allowable gross load on the foundation with a factor of safety (FS) of 4. Assume the depth is 1m & that general shear failure occurs in soil.

Example 3.2 A square foundation is 1.5m x 1.5m in plan. The soil supporting the foundation has a friction angle ǿ = 20o, & c’=15.2 kN/m2. The unit weight of the soil, ץ, is 17.8 kN/m3. Determined the allowable gross load on the foundation with a factor of safety (FS) of 4. Assume the depth is 1m & that local shear failure occurs in soil.

Example 3.3 A square column foundation has to carry a Gross allowable total load of 150 kN. The depth of foundation is 0.7m. The load is inclined at an angle of 20o to the vertical. Determined the width of foundation B . Use equation of Meyerof with the following properties of soil’, F.O.S=3 friction angle ǿ = 30o c’=0. weight of the soil, ץ=18 kN/m3.

Example 3.4 A square column foundation 1.5m x 1.5m. Assume that the one way load ecentricity e = 0.15m. Determined the ultimate load,Qult, with the following properties of soil’ friction angle ǿ = 30o c’=0. weight of the soil, ץ=18 kN/m3.