A clay layer 25 metres thick has a saturated unit weight of 19.2 kN/m^{2}. Ground water level occurs at a depth of 5 metres. It is proposed to construct a reinforced concrete foundation, 12.5 m × 50 m, on top of the layer, to transmit a uniform pressure of 150 kN/m^{2}.
Verify the settlement at its centre, suppose that the void ratio drops from 0.725 to 0.700 due to loading. E for the clay is 30 MN/m^{2}.