ations on the values at the midpoint of the layer.

Assume that the moist unit weight of sand in Problem 1 to be 122 lb/ft3 , the saturated unit weight of sand 130 and clay 120 lb/ft3 . What should be the thickness of a soil layer of a unit weight of 120 lb/ft3 that would cause consolidation settlement of 0.1 ft in 100 days?For the square foundation below determine: a) ultimate settlement and b) settlement after 140 days, due to consolidation of the clay layer. Base your calculations on the values at the midpoint of the layer.