SOIL MECHANICS

Problem Set 1 (PS1) Determine the quilt and Quit for the 8ft x 8ft spread footing in the soil profile below: Qult Clay z fult Above the base of the footing: y= 110 pcf: $ = 25 ; c=0 Below the base of the footing: Ymoist = 115 pcf; $ = 34; c=0 = (Hint: Local shear failure) Table 16.2 Terzaghi's Modified Bearing Capacity Factors N., N. and Eqs. (16.19). (16.20), and (16.21), respectively (dog) N N, NE (deg) 0 1 2 3 8 10 11 12 13 14 16 16 17 18 N. 5.70 5.X) 6.10 6,30 6.51 6.74 6.97 7.22 7.47 7.74 8.02 8.32 8,63 8.96 9.31 9.67 10.06 10.47 10.90 11.36 11.85 12.37 12.92 13.51 14.14 14.80 N 1.00 1.07 1.14 1.22 1.30 1.39 1.49 1.59 1.70 1.82 1.94 2.ON 2.22 2138 2.55 2.73 2.92 3.13 3.36 3.61 3.88 4.17 4.48 4.82 5.20 5.60 0.00 O.OKS 0.02 0.04 0.055 0.074 0.10 0.128 0.16 0.20 0.24 0.30 0.35 0.42 0.48 0.57 0.67 0.76 0.88 1.03 1.12 1.35 1.55 1.74 1.97 2.25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 SO 16.53 16.30 17.13 18.03 18.99 20.03 21.16 22.39 23.72 25.18 26.77 28.SI 30.43 32.53 34.87 37.45 40.33 43.54 47.13 SL.17 55.73 60.91 66,80 73.55 8131 N 6.05 6.54 7.07 7.66 8.31 9.03 9.82 10.69 1167 12.75 13.97 16.32 16.85 18.56 20.50 22.70 2521 28.06 31.34 35.11 39.48 44.54 $0.46 5741 65.60 2.59 2.88 3.29 3.76 4.39 4.83 5.SI 6.32 7.22 8.35 9.41 10.90 12.75 14.71 17:22 19.75 22.50 26.25 30.0 36.00 41.70 4930 59.25 71.45 85.75 20 28 ada 22 23 24 25