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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Textbook Question
Chapter 7, Problem 7.14QPP
A spread footing supported on a sandy soil has been designed using ASD to support a certain column load with a factor of safety of 2.5 against a bearing capacity failure. However, there is some uncertainty in both the column load, P, and the friction angle,
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A square footing 3 m x 3 m is supporting an axial load of 650 kN. The weight of the soil is aasumed to be 17.32 kN/m^3. Compute the vertical stress increment due to this load at a depth of 1.5 m below the center of the footing using the approximate method.
a.
51.46 kPa
b.
32.10 kPa
c.
76.54 kPa
d.
50.56 kPa
A footing is supported by soil having a cohesion of 50 kPa. The unit weight of soil is 19 kN/m³ and the depth of footing is 3 m below the ground surface. The angle of internal friction is 10°.1. Assuming a local shear failure, which of the following most nearly gives the net ultimate bearing capacity per meter for a strip footing having a width of 1.25 m? Use the equation of Terzaghi’s ultimate bearing capacity for strip footing. a. 314 kPab. 380 KPac. 256 kPad. 280 kPa2. If factor of safety is 2.5, which of the following most nearly gives the safe bearing pressure for a footing 1.25 m wide and 6 m long assuming a general shear failure? Use the equation.a. 208 kPab. 240 kPac. 300 kPad. 180 kPa
A strip footing shown is resting on loose sand has the following data (refer to figure
h = 0.95 m
Df = 1.9 m
B = 1.8 m
Unit weight of soil above GWT = 1750 kg/m3
Saturated Unit weight of soil = 1950 kg/m3
c = 12 kPa
Angle of internal friction = 30 degrees
Calculate the following:
Net Allowable Bearing Capacity of the footing using Terzaghi’s assumption, kPa.
Use FS = 2.5
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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