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7. (a) Given the strip footing layout and ground profile below, determine the ultimate bearing capacity of the footing using bearing capacity equation shown below. Assume the unit weight of water = 10 kN/mº. State clearly other assumptions as necessary for the calculation. (6 marks) 5m 1m CLAY V sat Y=19kN/mY=20kN/m C=0.05; C -0.15; e =0.80; c =50kPa Cy=40kPa 5m CLAY IMCOMPRESSIBLE LAYER = Note: Bearing capacity equation, quit = cu Nc+q where Nc= 2+1 (b) For the strip footing shown in (a), calculate total consolidation settlement due to 80kPa net foundation load. State clearly other assumptions as necessary for the calculation. (8 marks) Се od Note: SC1D -H log С. 1 + os (C) Briefly discuss the possible reasons for the following field observations: (i) the consolidation settlement measured in the field is significantly larger than the estimation using Terzaghi's theory of one-dimensional consolidation. Please list three possible reasons. (3 marks) out (c) i + -H log 1 + 20 ( ) (ii) the consolidation settlement measured in the field is significantly smaller than the estimation using Terzaghi's theory of one-dimensional consolidation. Please list three possible reasons. (3 marks)