Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Chapter 7, Problem 7.15QPP
A certain column carries a vertical downward load of 1,200 kN. It is to be supported on a 1 m deep, square footing. The soil beneath this footing has the following properties:
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A square footing which carries an axial load of 13000 kg has its bottom resting on a ground water table at a depth of 2.5 m from the ground surface. Nc = 35, Nq = 22, Nγ = 19. Take PDRY = 1910 kg/m3 and PSAT = 1600 kg/m3, c = 1800 kg/m2. Compute the net soil pressure.
A column carrying a load of 750 kN is to be founded on a square footing at a depth of 2m below the ground surface in a deep clay stratum. What will be the size of the footing if a factor of safety of 2.5 is considered? Pertinent soil parameters are saturated unit weight of 18.5kN/m^3 , cohesion of 30 kPa and angle of internal friction of 18°. The groundwater is at the base of the footing but is expected to rise to the ground level during the rainy seasons.
A square footing 2.5 m X 2.5 m is built on a homogeneous bed of sand
of density 19 kN/m3
having an angle of shearing resistance of 36o
. The
depth of foundation is 1.5 m below the ground surface. Calculate the
safe load that can be applied on the footing with a factor of safety of 3.
Chapter 7 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 7 - List the three types of bearing capacity failures...Ch. 7 - A 1.2 m square, 0.4 m deep spread footing is...Ch. 7 - A 5 ft wide, 8 ft long, 2 ft deep spread footing...Ch. 7 - A column carrying a vertical downward unfactored...Ch. 7 - A column carrying a vertical downward ultimate...Ch. 7 - A 120 ft diameter cylindrical tank with an empty...Ch. 7 - A 1.5 m wide, 2.5 m long, 0.5 m deep spread...Ch. 7 - A 5 ft wide, 8 ft long, 2 ft deep spread footing...Ch. 7 - A bearing wall carries a total unfactored load 220...Ch. 7 - After the footing in Problem 7.9 was built, the...
Ch. 7 - A bearing wall carries a factored ultimate...Ch. 7 - A 5 ft wide, 8 ft long, 3 ft deep footing supports...Ch. 7 - Prob. 7.13QPPCh. 7 - A spread footing supported on a sandy soil has...Ch. 7 - A certain column carries a vertical downward load...Ch. 7 - A building column carries a factored ultimate...Ch. 7 - A 3 ft square footing is founded at a depth of 2.5...Ch. 7 - A building column carries factored ultimate loads...Ch. 7 - Develop a spread sheet to compute allowable total...Ch. 7 - A certain column carries a vertical downward load...Ch. 7 - Repeat Problem 7.20 using LRFD assuming the...Ch. 7 - Conduct a bearing capacity analysis on the Fargo...Ch. 7 - Three columns, A, B, and C, are collinear, 500 mm...Ch. 7 - Two columns, A and B, are to be built 6 ft 0 in...Ch. 7 - In May 1970, a 70 ft tall, 20 ft diameter concrete...
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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_forwardRefer to the rectangular combined footing in Figure 10.1, with Q1 = 100 kip and Q2 = 150 kip. The distance between the two column loads L3 = 13.5 ft. The proximity of the property line at the left edge requires that L2 = 3.0 ft. The net allowable soil pressure is 2500 lb/ft2. Determine the breadth and length of a rectangular combined footing.arrow_forwardA 2.0 m 2.0 m square pad footing will be placed in a normally consolidated clay soil to carry a column load Q. The depth of the footing is 1.0 m. The soil parameters are: c = 0, = 26, = 19 kN/m3, and cu = 60 kN/m2. Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.arrow_forward
- A 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 column carrying a load of 750 kN is to be founded on a square footing at a depthof 2 m below the ground surface in a deep clay stratum. What will be the size of thefooting if a factor of safety of 3 is considered? Pertinent soil parameters are saturatedunit weight of 18.5 kN/m3, cohesion of 22.5 kPa and angle of internal friction of 18°. Thegroundwater is at the base of the footing but is expected to rise to the groundlevel during the rainy seasons.arrow_forwardDetermine the allowable soil bearing capacity of a frictionless soil for a 6 ft wide square footing, bottom of footing at 2 ft below ground level using Terzaghi’s equation. Cohesion = 2000 lb/ft2 Unit weight of soil: 110 lbs/ft3 Factor of safety: 3.0arrow_forward
- A continuous footing is shown in Figure 16.17. Using Terzaghi’s bearing capacity factors, determine the gross allowable load per unit area (all ) that the footing can carry. Assume general shear failure. Given: γ = 19 kN/m3, c′ = 31kN/m2 , , Df = 1.5 m, B = 2 m, and factor of safety = 3.5.arrow_forwardA column carrying a load of 750 kN is to be founded an a square footing at a depth of 2 m below the ground surface in a deep clay stratum. What will be the size of the footing it a factor of safety of 2.5 is considered? Pertinent soil parameters are saturated unit weight of 18.5 kN/m², cohesion of 30 kPa and angle of internal friction of 18 degrees. The groundwater is at the base of the footing but is expected to rise to the ground level during the rainy seasons.arrow_forwardA square footing which carries an axial load of 132530 kg has its bottom resting on a ground water table at a depth of 2.5 m from the ground surface. Nc = 35, Nq = 22, Nγ = 19. Take PDRY = 1846 kg/m3 and PSAT = 1965 kg/m3, C = 1605 kg/m2. (Nc = 35, Nq = 22, Nγ = 19). Compute the required width of the footing using a factor of safety of 3.arrow_forward
- A square footing 2.5 m X 2.5 m is built on a homogeneous bed of sand of density 19 kN/m3having an angle of shearing resistance of 36o. The depth of foundation is 1.5 m below the ground surface. Calculate the safe load that can be applied on the footing with a factor of safety of 3. Take bearing capacity factors as Nc= 27, Nq = 30, Nγ = 35arrow_forwardA 1.5 m square footing is founded at a depth of 1m (equal to the foundation thickness) in fine-grained soil with the following properties: ?dry = 20 kN/m3; ?sat = 22 kN/m3; ?u,k = 70 kPa; ?k′ = 10 kPa; ?k′ = 30° The load on the footing is vertical but has a maximum eccentricity (?) of 250 mm from one axis (Hint: B- = B − 2e). If the water table is at the foundation level, determine the design bearing resistance of the footing for a. short-term condition b. long-term conditionarrow_forwarda) A square footing placed at a depth of 1 m is required to carry a load of 1000 kN. Find the required size of footing given the following data. C = 10 kPa, ϕ = 38o, γ = 19 kN/m3, Nc = 61.35, Nq = 48.93, Nγ= 74.03 and F = 3.Assume water table is at the base of footing.arrow_forward
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