9) A proposed structure will transmit an average increase in pressure of 17C! kNX n1E to the centre of a 3 311 thick layer of saturated clay. The clay layer is underlain by an irnpert-'ious material and overlain by sand. A laboratory test on the clay over the same pressure range gave a change in void ratio from {192 to 0.83. The coefcient of permeability of the clay was 5X1 U'm nlf sec. Calculate: a) The total settlement of the clay layer. In) The time, t, for 30% consolidation of the later. T? = 0.25 n: U2