Refer to Figure 9.19. Calculate ? , u , and ? ? at A, B, C, and D for the following cases and plot the variations with depth. ( Note: e = void ratio, w = moisture content, Gs = specific gravity of soil solids, ?d = dry unit weight, and ysat = saturated unit weight.)

Figure 9.19

1 H - 5 ft Y&= 112 lb/ft Details of soil layer 11 H = 6 ft Ysu 120 lb/ft H = 8 ft Ysat 125 lb/ft T H H Hy Dry sand Sand Clay Rock Layer I Groundwater table Layer II Layer III