The intensity of passive earth pressure at a depth of 8 m in a cohesionless soil with an angle of internal friction of 30° when water rises to ground level is kN/m² Take saturated unit weight of sand as 21 kN/ m³ and y = 9.81 kN/m³

Compute the intensities of active and passive earth pressure at depth of 6 m in dry cohesionless sand with D= 30° and unit weight = 18 kN/m3.

Consider the soil profile shown in the figure below, and an initial groundwater depth of 5 feet below the ground surface. Assuming the soil above the water table is dry, then Ground Surface Ya = 115 Ib/ft G.= 2.65 5 ft SAND 15 ft Ysat = 120 Ib/ft3 e,- 1.1 C = 0.5 C, = 0.05 o- 2.8 ksf 15 ft CLAY ROCK a. The in-situ effective vertical stress in the middle of the clay layer is psf. b. If a uniform permanent load of 500 psf is applied on the ground surface, the estimated primary consolidation settlement of the clay layer is inches. c. If the groundwater table is lowered to the top of the clay layer at a final depth of 20 feet below the ground surface after the consolidation settlement in part (b) is completed, the effective vertical stress increase in the middle of the clay layer is psf.

1. A soil profile is shown in Figure 1. Assuming the water table is located at the surface and the profile is undisturbed. Show the variation of total vertical and horizontal stresses with the depth to a total depth of 12m. Assume there is a surcharge of 6kN/m2 and Groundwater is 5m below the surface. 5m Sandy clay c=25KN/m², þ=10°, y=18KN/m³ 7.5m Silt c=10KN/m², p=15°, y=20kN/m³ Sand =35°, y=19KN/m³ Figure 1