1. Footings for a structure are to be built beneath a basement slab on a clay soil at a depth of 20ft below present ground level. The groundwater table is 15 ft below the ground surface. The soil-void ratio is about 0.87. If the average bearing pressure on the footings is 2,600 psf, estimate the settlement of 10-ft and 5-ft square footings.
2. What is the factor of safety for the footings in Problem 1 against bearing failure if the clay soil has an unconfined compressive strength of 3,600 psf?