Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Textbook Question
Chapter 16, Problem 16.18P
Refer to the footing in Problem 16.16. Determine the gross ultimate load the footing can carry using the Patra et al. (2015) reduction factor method for rectangular foundations given in Eqs. (16.47), (16.49), and (16.50).
16.16 A square footing on sand is subjected to an eccentric load as shown in Figure 16.20. Using Meyerhof’s effective area concept, determine the gross allowable load that the footing could carry with Fs = 4. Given: γ = 16 kN/m3, c′ = 0, ϕ′ = 29°, Df = 1.3 m, B = 1.75 m, and x = 0.25 m. Use Eqs. (16.32) through (16.42) for shape, depth, and inclination factors.
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Question #3
A total load of 900 kN is uniformly distributed over a rectangular footing of size 3 x 2 m shown
in in Fig. 2. Due to the load on this footing, using influence factors determine the vertical stress
at a depth of 2.5 m
a) Under the corner at point C
b) Under the center D.
c) If another footing of size 3 x 1 m with a total load of 450 kN is constructed adjoining
the previous footing, what is the additional stress at point C at the same depth due to
the construction of the second footing?
d) Using Newmark's chart, determine the vertical stress due two both footings at a depth
of 2.5 m under point E.
C
2 m
3 m
E
3 m
1 m
A water tank foundation has a footing of size 6 x 6 m founded at a depth of 3 m below ground level
in a medium dense sand stratum of great depth. The corrected average SPT value obtained from the
site investigation is 20. The foundation is subjected to a vertical load at an eccentricity of B/10
along one of the axes. Figure Ex. 12.15 gives the soil profile with the remaining data. Estimate the
ultimate load, Quir by Meyerhof's method.
net
WW/
SPT
Qutt
c = 0, y = 18.5 kN/m²,
$ = 33°, Ncor
= 20
3 m
Medium dense sand
B
10
E BxB 6x6 m
Figure Ex. 12.15
Subject: Soil
Chapter 16 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 16 - A continuous footing is shown in Figure 16.17....Ch. 16 - Refer to Problem 16.1. If a square footing with...Ch. 16 - Redo Problem 16.1 with the following: = 115...Ch. 16 - Redo Problem 16.1 with the following: = 16.5...Ch. 16 - Redo Problem 16.1 using the modified general...Ch. 16 - Redo Problem 16.2 using the modified general...Ch. 16 - Redo Problem 16.3 using the modified general...Ch. 16 - Redo Problem 16.4 using the modified general...Ch. 16 - Prob. 16.9PCh. 16 - If the water table in Problem 16.9 drops down to...
Ch. 16 - Prob. 16.11PCh. 16 - A square footing is subjected to an inclined load...Ch. 16 - A square footing (B B) must carry a gross...Ch. 16 - Redo Problem 16.13 with the following data: gross...Ch. 16 - Refer to Problem 16.13. Design the size of the...Ch. 16 - Prob. 16.16PCh. 16 - Prob. 16.17PCh. 16 - Refer to the footing in Problem 16.16. Determine...Ch. 16 - Figure 16.21 shows a continuous foundation with a...Ch. 16 - The following table shows the boring log at a site...
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