A 1.5 mx 1.5 m footing is carrying a 400 kN load as shown in the figure below. Depth (m) 0.0 1.0 2.0 3.5 Df 6.0 77 Groundwater Sandy table soil (Yw9.81 kN/m³): Stiff Clay (OCR = 2) Bedrock Yt 16.5 kN/m³ E = 9,000 kPa Ysat 17.5 kN/m³. E 15,000 kPa Ysat 18.0 kN/m³ eo= 0.8 Cc = 0.15, C₁ = 0.02 Eu = 40,000 kPa (a) Estimate the immediate settlement beneath the center of the footing. Assuming that Poisson's ratios of sand and soft clay are 0.3 and 0.5, respectively. Use numerical integration approach. For the calculations, use layers (below the bottom of the footing) of thicknesses: 1 m; 1.5 m, and 2.5 m. (b) Determine the primary consolidation settlement beneath the center of the footing. Note: Use the 2:1 method to determine the stress increase below the footing.

A 650-kN column load is supported on a 1.5 m wide by 2.0 m long by 0.5 m deep spread foot-ing. The soil below is a well-graded, normally consolidated sand with g = 18.0 kN/m3 and the following SPT N60 values:Depth (m) 1.0 2.0 3.0 4.0 5.0N60 12 13 13 8 22 The groundwater table is at a depth of 25 m. Compute settlement of the footing using the gen-eralized elastic method with Christian and Carrier’s (1978) influence factors.