The base of the square foundation, 3 mx 3 m, is located at 1 m depth....

 

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The base of the square foundation, 3 mx 3 m, is located at 1 m depth. The soil supporting foundation has a friction angle of '= 20° and c'= 20 kN/m². The unit weight of soil, y, is 21 kN/m³. What is the net safe load on the foundation with a factor of safety (FS) of 3 if water table is far below the foundation level? (Assuming general shear failure and use Terzaghi bearing capacity equation (attached)) qu=c¹N₁ +qN₁ +0.5 BN, For strip footing q=1.3c' N₂ +qN, +0.4yBN, For square footing q=1.3c' N +qN, +0.37BN, N₂ 1.00 1.10 1.22 1.35 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 N₂ 5.70 6.00 6.30 6.62 6.97 7.34 7.73 8.15 8.60 9.09 9.61 10.16 10.76 11.41 12.11 12.86 13.68 14.60 15.12 16.56 17.69 18.92 20.27 21.75 N, 0.00 0.01 0.04 1.49 1.64 1.81 2.00 2.21 2.44 2.69 2,98 3.29 3.63 1.04 4.02 4.45 6.04 6.70 7.44 8.26 9.19 10.23 11.40 12.72 0.06 23.36 25.13 "From Kumbhojkar (1993) 0.10 0.14 0.20 0.27 0.35 0.44 0.56 0.69 0.85 1.26 1.52 4.92 5.45 2.18 1.82 2.59 3.07 3.64 4.31 5.09 6.00 7.08 8.34 4 26 27 8888835993999998 28 29 30 31 32 34 36 37 40 41 42 43 44 45 46 47 48 49 50 For circular footing N₁ N," 14.21 9.84 15.90 11.60 17.81 13.70 19.98 16.18 19.13 22.65 26.87 31.94 38.04 45.41 54.36 65.27 N₂ 27.09 29.24 31.61 34.24 37.16 40.41 44.04 48.09 52.64 57.75 63.5 70.01 77.50 85.97 95.66 106.81 119.67 134.58 151.95 172.28 196.22 224.55 258.28 298.71 347.50 22.46 25.28 28.52 32.23 36.50 41.44 47.16 53.80 61.55 70.61 81.27 93.85 108.75 126.50 147.74 173.28 204.19 241.80 287.85 344.63 415.14 78.61 95.03 115.31 140.51 171.99 211.56 261.60 325.34 407.11 512.84 650.67 831.99 1072.80 The base of the square foundation, 3 mx 3 m, is located at 1 m depth. The soil supporting foundation has a friction angle of '= 20° and c'= 20 kN/m². The unit weight of soil, y, is 21 kN/m³. What is the net safe load on the foundation with a factor of safety (FS) of 3 if water table is far below the foundation level? (Assuming general shear failure and use Terzaghi bearing capacity equation (attached)) qu=c¹N₁ +qN₁ +0.5 BN, For strip footing q=1.3c' N₂ +qN, +0.4yBN, For square footing q=1.3c' N +qN, +0.37BN, N₂ 1.00 1.10 1.22 1.35 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 N₂ 5.70 6.00 6.30 6.62 6.97 7.34 7.73 8.15 8.60 9.09 9.61 10.16 10.76 11.41 12.11 12.86 13.68 14.60 15.12 16.56 17.69 18.92 20.27 21.75 N, 0.00 0.01 0.04 1.49 1.64 1.81 2.00 2.21 2.44 2.69 2,98 3.29 3.63 1.04 4.02 4.45 6.04 6.70 7.44 8.26 9.19 10.23 11.40 12.72 0.06 23.36 25.13 "From Kumbhojkar (1993) 0.10 0.14 0.20 0.27 0.35 0.44 0.56 0.69 0.85 1.26 1.52 4.92 5.45 2.18 1.82 2.59 3.07 3.64 4.31 5.09 6.00 7.08 8.34 4 26 27 8888835993999998 28 29 30 31 32 34 36 37 40 41 42 43 44 45 46 47 48 49 50 For circular footing N₁ N," 14.21 9.84 15.90 11.60 17.81 13.70 19.98 16.18 19.13 22.65 26.87 31.94 38.04 45.41 54.36 65.27 N₂ 27.09 29.24 31.61 34.24 37.16 40.41 44.04 48.09 52.64 57.75 63.5 70.01 77.50 85.97 95.66 106.81 119.67 134.58 151.95 172.28 196.22 224.55 258.28 298.71 347.50 22.46 25.28 28.52 32.23 36.50 41.44 47.16 53.80 61.55 70.61 81.27 93.85 108.75 126.50 147.74 173.28 204.19 241.80 287.85 344.63 415.14 78.61 95.03 115.31 140.51 171.99 211.56 261.60 325.34 407.11 512.84 650.67 831.99 1072.80

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To calculate the net safe load on the foundation with a factor of safety FS of 3 we need to use the ... View the full answer