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 7.16QPP
A building column carries a factored ultimate vertical downward load of 320 k. It is to be supported on a 3 ft deep, square footing. The soil beneath this footing has the following properties:
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A continuous footing installed at a depth of 3 feet with base of 4 feet wide is constructed on cohesionless
soil with a unit weight of 125 lb/ft³ and an angle of internal friction of 31°. The factor of safety
requirement for the design is 2. The water table is sufficiently below
the base of the foundation that won't interfere with the design.
Determine:
1. Allowable bearing capacity (qa)
2. Allowable wall load in lb/ft.
Plb
B
Answer asap for upvote.
A 1.4 m wide footing is embedded 2.35m beneath the ground surface. The investigation indicated a unit weight equal to 18.23 kN/m3.
The cohesion is 15.7 kPa. The saturated unit weight of the soil is 19.10 kN/m3
Determine the net allowable load (kN) that can be carried by the footing if the groundwater table is 0.54m below the footing. Assume footing is a circle
Terzaghi's Bearing Capacity
A soil report for an undisclosed location summarizes the parameters for the ground strata below:
Angle of internal friction, Φ = 34 degrees
Factor of safety on bearing capacity = 3
A strip footing 2.5 m wide is to be constructed at a depth of 3m below ground level. The shear strength parameters to be used in design being c|= 65kN/m2 and ø| = 34°.
The unit weight of the soil above water table is 18kN/m3 , and below the water table the saturated unit weight is 20kN/m3.
a. If the water table is well below foundation level
b. If the water table is at the surface.
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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- Show your solution and diagram. Design a square spread footing to support an edge column 460mm x 460mm in dimension. The allowable soil pressure is 478.5 KPa, unit weight of soil is 20.4 KN/m³, unit weight of concrete is 23.5 KN/m³, fć = 21 MPa, fy = 414 MPa, 75mm clear cover and 25mm diameter rebars both ways.arrow_forwardA structural engineer finished a design of a library. They determine that each column will carry 1000 lbs. the soil beneath the footing has the properties: gamma= 130 pcf, c= 75psf, phi= 40 degrees. The groundwater table is of great depth so it’s no concern. Sketch figures. What is the minimum size of the footing for a factor of safety of 3? Case 1: assume square footing Case 2: assume round footingarrow_forwardA rectangular footing 13'x14' supports a rectangular column 12" x 24", with DL = 340 kips and LL = 180 kips. The allowable soil pressure is 2.5 ksf. Determine the total soil pressure and indicate if the footing size is appropriate O 2.9ksf, YES O 3.1ksf. YES O 3.1ksf, NO O 3.8ksf, NOarrow_forward
- A rectangular footing 3m by 4m is founded 1.2m below the ground surface for which the unit weight of soil is 17.8kN/m3. The cohesion strength is 10kPa and the angle of internal friction is 20degrees. Under the condition of general failure, evaluate the contribution from the following to the ultimate soil bearing capacity in kPa. The ground water table is at a level that does not affect the unit weight of the soil. Use Terzaghi’s bearing capacity factor. For Ø=20degrees: Nc = 17.69, Nq = 7.44, Ny = 3.64. 23. Due to Cohesion Strength Due to soil overburden Due to footing dimensionarrow_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_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, cu = 60 kN/m2 (=0 condition). Determine the maximum possible value for Q, considering short-term and long-term stability of the footing.arrow_forward
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