Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 8, Problem 8.2P
A point load of 500 kN is applied at the ground level. Plot the lateral variation of the vertical stress increase Δσ at depths of 2 m, 3 m, and 4 m below the ground level.
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refer to the figure due to application of line load q1 and q2 . the vertical stress increase at point a is 42 kn/m2 determine the magnitude of q
Question
A uniformly distributed line load of 500kN/m is acting on the ground surface. Based
on Boussinesq's theory, the ratio of vertical stress at a depth 2 m to that at 4 m right
below the line of loading is
The Infinite line load as shown in figure has an Intensity of 600 kN/m. Determine the vertical stress at a point A with coordinates
x = 5 m and Z = 4 m.
|
q = 600 kN/m
Z=4m
Chapter 8 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 8 - Four point loads with the same magnitude of P are...Ch. 8 - A point load of 500 kN is applied at the ground...Ch. 8 - A point load of 1000 kN is applied at the ground...Ch. 8 - A 10 ft diameter flexible loaded area is subjected...Ch. 8 - For the flexible loaded area in Problem 8.4, plot...Ch. 8 - Two line loads q1 and q2 of infinite lengths are...Ch. 8 - A 9 ft wide and infinitely long flexible strip...Ch. 8 - Figure P8.8 shows a flexible rectangular raft that...Ch. 8 - Prob. 8.9PCh. 8 - Prob. 8.10P
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- A point load of 1000 kN is applied at the ground level. Plot the variation of the vertical stress increase z with depth at horizontal distances of 1 m, 2 m, and 4 m from the load.arrow_forwardRepeat Problem 10.12 for q = 700 kN/m2, B = 8 m, and z = 4 m. In this case, point A is located below the centerline under the strip load. 10.12 Refer to Figure 10.43. A strip load of q = 1450 lb/ft2 is applied over a width with B = 48 ft. Determine the increase in vertical stress at point A located z = 21 ft below the surface. Given x = 28.8 ft. Figure 10.43arrow_forwardA 10 ft diameter flexible loaded area is subjected to a uniform pressure of 1200 lb/ft2. Plot the variation of the vertical stress increase beneath the center with depth z = 0 to 20 ft. In the same plot, show the variation beneath the edge of the loaded area.arrow_forward
- A point load of 1000 kN is applied at the ground level. Plot the variation of the vertical stress increase Δσ with depth at horizontal distance of 1 m, 2 m, and 4 m from the load.arrow_forwardStresses in a soil mass.arrow_forwardThe area shown in the figure carries a uniform pressure of 200 kPa. Find the total vertical effective stress at 5 meter below points A and B. Ysa 19 kN/m³ 8 m 5 m 7 m 6 marrow_forward
- The effective stress at a point located at a depth of 5.5 ft in a saturated soil (γm = 108 lb/ft3, γsat = 118 lb/ft3) is most nearly:arrow_forwardA pole carries a vertical load of 200 kN. Determine the vertical total stress increase in kPa at a depth 5 m directly below the polearrow_forwardThe soil profile shown consists of dry sand (4-m thick) which overlies a layer of clay (3-m thick). Ground water table is located at the interface of the sand and clay. a. If the water table rises to the top of the ground surface, what is the change in the effective stress (in kPa) at the bottom of the clay layer? Round off to two decimal places. (ANSWER: 26.336) b. Compute the effective stress at the bottom of the clay layer in kPa. Round off to three decimal places (ANSWER: 97.686) c. How many meters must the ground water table rise to decrease the effective stress by 14 kPa, at the bottom of the clay layer? Round off to two decimal places (ANSWER: 2.13)arrow_forward
- A uniform surface load of 225 kN/m² is applied over the area shown in the following diagram. Estimate the stress increase in soil due to the above load at a depth of 7 m below point A. 2m 3m 3 m A 3 m 2m 8 marrow_forwardA uniformly distribute line load of 500 kN/m is acting on the ground surface. Based on Boussinesq's theory the ratio of vertical stress at a depth 2 m to that at 4 m, right below the line of loading is.arrow_forwardreferring to the figure below, calculate the distribution of vertical stress along vertical plane passing through one of the two forces. Specify the value of stress in kPa at depth of 4marrow_forward
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