Problem 1 Consider the soil profile shown in the figure subjected to the uniformly distributed load, Ao on the ground surface. Given: Ao = 26 kN/m^2; H1 = 1.83 m; , H2 = 3.66 m: and H3 = 5.5 m. Soil characteristics are as follows: Sand: yd =17.9 kN/m2: ysat 18.5 kN/m3 Clay: ysat = 18.3 kN/m3 . LL=38; e=0.73; Cs=(1/5) Cc Estimate the primary consolidation settlement in the clay if a) The clay is normally consolidated b) The preconsolidation pressure oc=105 kN/m2

Redo Problem 6.12 using Figure 6.15. 6.12 Refer to Problem 6.1. Using Eqs. (6.3) and (6.29), estimate the average stress increase (av) below the center of the loaded area between depths of 3 m and 6 m. 6.1 A flexible circular area is subjected to a uniformly distributed load of 150 kN/m2 (Figure 6.2). The diameter of the load area is 2 m. Determine the stress increase in a soil mass at points located 3 m below the loaded area at r = 0, 0.4 m, 0.8 m, and 1 m. Use Boussinesqs solution. Figure 6.2 Increase in pressure under a uniformly loaded flexible circular area

The soil profile at a site consists of 10 m of gravelly sand underlain by a soft clay layer. The water table lies 1 m below the ground level. The moist and saturated unit weights of the gravelly sand are 17.0 kN/m3 and 20.0 kN/m3, respectively. Due to some ongoing construction work, it is proposed to lower the water table to 3 m below the ground level. What will be the change in the effective stress on top of the soft clay layer?

The soil profile at a site consists of 10 m of gravelly sand underlain by a soft clay layer. The water table lies 1 m below the ground level. The moist and saturated unit weights of the gravelly sand are 17.0 kN/m3 and 20.0 kN/m3, respectively. Due to some ongoing construction work, it is proposed to lower the water table to 3 m below the ground level. What will be the change in the effective stress on top of the soft clay layer?