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A building column carries factored ultimate loads of 5,500 kN vertical and 1,200 kN horizontal. The column is founded on a 1.5 m square footing at a depth of 1.7 m. The soil is a cohesionless sand with
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- A square footing (B B) must carry a gross allowable load of 1160 kN. The base of the footing is to be located at a depth of 2 m below the ground surface. If the required factor of safety is 4.5, determine the size of the footing. Use Terzaghis bearing capacity factors and assume general shear failure of soil. Given: = 17 kN/m3, c = 48 kN/m2, =31.arrow_forwardA 2 m 3 m spread footing placed at a depth of 2 m carries a vertical load of 3000 kN and a moment of 300 kN m, as shown in Figure P6.14. Determine the factor of safety using Meyerhofs effective area method. Figure P6.14arrow_forwardA strip footing foundation 1 m wide is constructed in the slope of a hill whose surface inclination is 20°. The soil in the hill is a dense sand, with a unit weight of 19 kN/m3 and an angle of internal friction of 40°. Assume that the D/B ratio is about 1. Applying a factor of safety of 3, determine the wall loading the foundation can carry, per meter of footing length.arrow_forward
- Determine the net ultimate bearing capacity of a mat foundation measuring 20m x 9m on a saturated clay with = 85 kN/, =0,. sand with the allowable settlement is 50mm, and .arrow_forwardA circular ring foundation for an overhead tank transmits a contact pressure of 300 kN/m 2 . Its internal diameter is 6 m and external diameter 10m. Compute the vertical stress on the center line of the footing due to the imposed load at a depth of 6.5 m below the ground level. The footing is founded at a depth of 2.5 m.arrow_forwardA 2-m by 2-m square footing is located 1.8 m below the ground surface and carries a load of 1000 kN. Determine the net vertical stress increment due to the uniform load at a depth of 4 m below the center of the footing.arrow_forward
- A footing 2m square is located a depth of 4m in a stiff clay of saturated unit weight 21kN/m3. The undrained strenght of the clay at a depth of 4m is given by the 3 parameters c=120kN/m2 and φ=0o . For a factor of a safety of 3 with respect to shear failure ,What load could be carried by the footing.arrow_forwardA mat foundation on saturated clay has plan view dimensions of 20 m x 30 m. Given that the gross allowable load is 60 MN, undrained shear strength of the clay is 60 kPa, and its unit weight is 18 kN/m3 find the depth of the fully compensated foundation. What depth of the mat foundation corresponds to the net factor of safety of 5? What is the gross factor of safety for this depth?arrow_forwardRedo Problem 16.1 with the following: = 16.5 kN/m3, cu = 41 kN/m3, =0, Df = 1.5 m, and factor of safety = 5. 16.1 A continuous footing is shown in Figure 16.17. Using Terzaghis bearing capacity factors, determine the gross allowable load per unit area (qall) that the footing can carry. Assume general shear failure. Given: = 19 kN/m3, c = 31kN/m2, =28, Df = 1.5 m, B = 2 m, and factor of safety = 3.5. Figure 16.17arrow_forward
- Redo Problem 16.1 with the following: = 115 lb/ft3, c = 1100 lb/ft2, =35, Df = 3.5 ft, B = 5 ft, and factor of safety = 4. 16.1 A continuous footing is shown in Figure 16.17. Using Terzaghis bearing capacity factors, determine the gross allowable load per unit area (qall) that the footing can carry. Assume general shear failure. Given: = 19 kN/m3, c = 31kN/m2, =28, Df = 1.5 m, B = 2 m, and factor of safety = 3.5. Figure 16.17arrow_forwardIf the water table in Problem 16.9 drops down to 0.25 m below the foundation level, what would be the change in the factor of safety for the same gross allowable load? 16.9 A square footing is shown in Figure 16.18. Determine the gross allowable load, Qall, that the footing can carry. Use Terzaghis equation for general shear failure (Fs = 4). Given: = 17 kN/m3, sat = 19.2 kN/m3, c = 32 kN/m3, =26, Df = 1 m, h = 0.5 m, and B = 1.5 m. Figure 16.18arrow_forwardRefer to Problem 16.1. If a square footing with dimension 2 m 2 m is used instead of the wall footing, what would be the allowable bearing capacity? 16.1 A continuous footing is shown in Figure 16.17. Using Terzaghis bearing capacity factors, determine the gross allowable load per unit area (qall) that the footing can carry. Assume general shear failure. Given: = 19 kN/m3, c = 31kN/m2, =28, Df = 1.5 m, B = 2 m, and factor of safety = 3.5. Figure 16.17arrow_forward
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