6.4 A25 cm total consolidation settlement of the two clay layers shown in Figure P6.1 is expected owing to the application of the uniform surcharge q. Find the duration after the load application at which 12.5 cm of total settlement would take place. 1.5m 0.6 m Sand Clay 0.6m G.W.T 3 m C = 0.13 cm/min Clay 1.5 m Figure P6.1 C-0.13 cm2/min Sand Pervious Pervious Pervious Impervious o H=2H 10 H = H 10 H = H Pervious Pervious Pervious Impervious (a) (b) (c) (d) (e) Pervious Figure 6.3 Pervious Pervious Pervious W 2 Pervious H=2H H=2H H = 2H H = 2H H = H Pervious (g) Pervious Impervious (h) Impervious H = H Pervious Impervious Z Z G H = H Pervious Impervious (i) (j) (k) H =H + Pervious