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 3, Problem 3.8QPP
A vertical load of 20 k is applied to a
a. Compute the induced vertical stress,
b. Compute the induced vertical stress,
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Students have asked these similar questions
6. A concentrated load of 1500 KN is applied at the ground surface at point A whose coordinate is
(0,0,0).
a. Determine the vertical stress, in KN at a point 2.5 m directly below A.
b. Determine the vertical stress, in KN at a point whose coordinate is (1.5, 0, 2.5).
C.
Determine the vertical stress, in KN at a point whose coordinate is (1.5, 2, 2.5).
A vertical load of 320 kips is applied to a 5ft by 5ft area at the ground surface that is level in the figure on the right.
a. Compute the induced vertical stress, Az, at a point 3 ft below the corner of this square loaded area using B's equation.
b. Compute the induced vertical stress, Aoz, at a point 3 ft below the center of this square loaded area using the chart.
c. Compute the average induced vertical stress, Aoz, at a depth of 3 ft below this square loaded area using the 1:2 method.
Solution:
• Preliminary Calculations:
1). Area of the footing: A =
●
2). Bearing pressure at the bottom of the footing: q =
Calculation of induced stress:
a). Below the corner using the B's equation:
1). m =
2). n =
3). Io =
2).
4). Az,corner
psf;
b). Below the center using the chart (or the square footing equation):
Zf
1). //
B
B
||
3). Io =
=
=
4). Az, center
c). Averaged induced streess below the footing:
1). Io:
=
ft²;
2). Az, average
||
psf;
psf;
psf;
Silty Sand:
(SM)
Clayey Silt
(ML) ▼
A
12 ft.…
A concentrated load of 1521 kN is applied at the ground
surface at point A
whose coordinate is (0,0,0). Determine the increase in
vertical stress at a point whose
coordinate is (7,0,1).
Chapter 3 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 3 - Explain the difference between moisture content...Ch. 3 - A certain saturated sand has a moisture content...Ch. 3 - Consider a soil that is being placed as a fill and...Ch. 3 - A sample of soil has a volume of and a weight of...Ch. 3 - A site is underlain by a soil that has a unit...Ch. 3 - The sub-surface profile at a certain site is shown...Ch. 3 - A vertical load of 300 kN is applied to a area at...Ch. 3 - A vertical load of 20 k is applied to a area at...Ch. 3 - 3m3m footing is to be built on the surface of a 15...Ch. 3 - A 3 ft square footing carries a sustained load of...
Ch. 3 - A 2m thick fill is to be placed on the soil shown...Ch. 3 - Estimate the effective friction angle of the...Ch. 3 - Explain the difference between the drained...Ch. 3 - A soil has c=5 kPa and =32. The effective stress...Ch. 3 - A footing with an embedment of 2 m is embedded in...Ch. 3 - Prob. 3.16QPPCh. 3 - Prob. 3.17QPPCh. 3 - A 9 ft thick fill is to be placed on the soil...
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