Problem 2: A foundation with dimensions of 4.5 m x 9 m carrying a stress of 100 kN/m² was placed at a depth of 1 m in the soil profile shown below. The soil is a normally consolidated clay that was tested in the laboratory which resulted in a void ratio of 0.97 at a pressure of 68.8 kN/m² and a void ratio of 0.725 at a pressure of 290 kN/m². If the dry sand has a total unit weight = 17.3 kN/m³, the saturated unit weight of the sand = 20.4 kN/m³, the saturated unit weight of the clay: 18.5 kN/m³ and the rock is impermeable, Calculate: 1) The final consolidation settlement at the center of the foundation. Use middle of clay layer as a representative point. 2) If C, 9.35 x 104 cm²/sec, how long will it take for half of the primary consolidation settlement to take place. == A Dry sand; e 0.5 G = 2.65 2 m Water table 2 m Sand G, 2.65 e = 0.6 3 m Clay w=36% G₁ = 2.75 D Rock