Design of square footing to support column load 150 , base of footing is at 3ft below the ground level. Soil is saturated clay with properties = 1100 lb/ft², = 0⁰, = 110 lb/ft³, = 0.01 ft²/ton, = 0.002 inch² /minute.

Determine safe bearing capacity and obtain the size of the footing for factor of safety. Clay 15ft below the base of the footing. Calculate Settlement of oedometer. Assuming the load is distributed 2:1, and is constant over the strata. Consider five layers in calculations.

When Settlement is 75% completed, assume that initial pore pressure is uniform in stratum and clay is underlain by incompressible pervious layer.

By Skemptons

Here D=3 ft, B/L = 1,(For square footing), then