A square rigid foundation measuring 6 ft X 6 ft in plan is supported by 30 ft (H) of layered soil with the following characteristics: Given that P= 100,000 lbs.; D= 3 ft; and u. = 0.3 for all layers, Layer no. Thickness (ft) E, (lb/ft?) Ya (lb/ft³) 1 0-8 432,000 112 8-22 158,000 117.5 3 22-30 1,223,000 122 a) estimate the elastic settlement of the foundation. b) Estimate the primary settlement assuming the soil in normally consolidated and the groundwater table is at the foundation level (do=P/(BL)

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