Foundation Design: Principles and Practices (3rd Edition)
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 8, Problem 8.11QPP

A proposed office building will include an 8 ft6 in square, 3 ft deep spread footing that will support a vertical downward service load of 160 k. The soil below this footing is an overconsolidated clay with the following engineering properties: C c / ( 1 + e 0 ) = 0.10 , C r / ( 1 + e 0 ) = 0.022 , σ m ' = 4 , 500 lb/ft 2 and γ = 113 lb/ft 3 . This soil strata extends to a great depth and the groundwater table is at a depth of 50 ft below the ground surface. Determine the total settlement of this footing.

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A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also 3 feet) spread footing. The normally consolidated clay has the following engineering properties: Ydry = 115.0 pcf $'=24° c'=90.0 psf Cc/(1+eo) = 0.15 The soil stratum extends to a great depth, and the ground water table is 50 ft below the ground surface. Using the classical piece-wise log-linear method, estimate the total settlement of this footing considering only the allowable bearing pressures using ASD approach. The unit weight of concrete is 150 pcf. State any assumptions made.
A proposed office building will include a 10 ft x10 ft square, 3 ft deep (the footing height is also3 feet) spread footing. The normally consolidated clay has the following engineering properties:γdry = 115.0 pcfφ’=24°c’= 90.0 psfCc/(1+e0) = 0.15The soil stratum extends to a great depth, and the ground water table is 50 ft below the groundsurface.a) Using the classical piece-wise log-linear method, estimate the total settlement of thisfooting considering only the allowable bearing pressures using ASD approach. The unitweight of concrete is 150 pcf. State any assumptions made.b) What is the maximum bending moment from the earthquake that this foundation cansupport? Consider bending moment only about one axis.c) In the case of your estimated maximum bending moment, what would be the totalsettlement?
2) A square footing carries an allowable load of 59130kg including its own weight. The bottom of footing is 1.0m below ground surface and water table coincide with bottom of footing. Assume General shear failure. Unit Weight = 1846kg/cu.m c= 1605kg/sqm Nc = 35 Nq=22 Ny=19 1.0m Sat unit wt = 1956kg/cu.m
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