Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 20, Problem 20.4P
Repeat Problem 20.2 based on LRFD using the following factors.
Load factor for dead load = 1.25
Load factor for live load = 1.75
Strength reduction factor on the ultimate bearing capacity = 0.50
20.2 A continuous foundation is required in a soil where c′ = 10 kN/m2,
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For an eccentrically loaded continuous foundation on sand, given B = 1.9m, Df = 0.81m, e/B = 0.21 (one way eccentricity), unit weight of soil = 18.58 kN/m³, and Φ = 35, Using Meyerhof effective area method, estimate the ultimate load per unit length of the foundation.
A continuous foundation having a width of 1.4 m is supported by a saturated clay layer of limited depth underlain by a rock layer. Given that Df = 1 m, H = 0.7 m, cu = 105 kN/m2, and γ = 18 kN/m3, estimate the ultimate bearing capacity of the foundation.
A square foundation is placed at a depth of 1.5 m within a sandy clay where c'=14k/m2 , phi'=23 and y=18 kN/m3 to carry a column load of 950 kN. Determine the width of the foundation that can be allowed on the foundation with a factor of safety of 3 and use the width value you have found to calculate the allowable bearing capacity(assume general shear failure and use gross values for the Terzaghi Bearing Capacity formulation for the given foundation type). If you don't write down the required equation to find the width of the foundation you cannot get credit from this question. Use the table given to you in the figure.
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Fundamentals of Geotechnical Engineering (MindTap Course List)
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