1. A rectangular footing, 10 20 m in plan, is constructed to support a water tank of 16,000 kN. The footing base is located on the ground given in Table 1. The footing has the following material properties: t = 1 m, E = 20,000 MPa, v = 0.2, y = 24 kN/m. (a) (b) Using a safety factor of 3, determine whether the proposed footing satisfies bearing. Using the weighted average method for E and v, determine: (i) (ii) the centre-to-corner differential settlement of the footing; the maximum bending moment. Table 1 Geotechnical model. Depth Qu E Ysat Layer V (m) (kPa) (deg.) (MPa) (kN/m) (kN/m) Clayey 0-4 5 32 30 0.3 17 20 Sand 4-30 Clay 20 0 10 0.5 19 20 30+ Bedrock 0 40 2,000 0.2 23 23 Ground water table presents at 4 m depth.