2. A site is underlain by a 5m-thick layer of clay. Below the layer of clay lies a 7m-thick layer of sand. The water table is located 2m below the ground surface. Draw the profile. Then, calculate the vertical effective stress at a point located 6m below the ground surface. Show your work and circle the answer.

2. A site is underlain by a 5m-thick layer of clay. Below the layer of clay lies a 7m-thick layer of sand. The water table is located 2m below the ground surface. Draw the profile. Then, calculate the vertical effective stress at a point located 6m below the ground surface. Show your work and circle the answer.

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter6: Vertical Stress Increase In Soil

Section: Chapter Questions

Problem 6.7P: Use Eq. (6.14) to determine the stress increase () at z = 10 ft below the center of the area...

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A soil profile consists of a clay layer underlain by a sand layers as shown. A tube is inserted into the bottom sand layer and the water level rises to 1.2m above the ground surface. Determine the effective stress at pt. A Determine the effective stress at pt. B. Determine the effective stress at pt. C Please answer this asap. For upvote. Thank you very much
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1.A dry sand is known to have an angle of internal friction of 29. A triaxial test is planned, where the confining pressure will be 41 kPa. What is the maximum axial stress, in kPa, (major principal stress) that can be applied? Calculate the value to 1 decimal place. Do not provide units in your answer. 2.A clay soil is subjected to a triaxial test under unconsolidated-undrained conditions. At failure, the major and minor principal stresses are 8401 psf and 4875 psf, respectively. What is the shear strength of this soil if the confining pressure is doubled? Provide your answer in psf with no decimals.
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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.…
The increase in stress under a corner of a rectangular loading is given by Boussinesq formula which is as follows:1. What is the increase in stress at point that is 2.5 meters beneath a corner of a 1.5 meter x 2 meter footing carrying a total uniform load of 75 kPa? a. 133.26 kPab. 229.23 kPac. 253.14 kPad. 211.25 kPa2. What is the increase in stress at point that is 2.5 meters beneath the center of a 3 meter x 4 meter footing carrying a total uniform load of 75 kPa? a. 916.94 kPab. 533.04 kPac. 245.50 kPad. 922.54 kPa3. What uniform load will produce an increase in stress of 36 kPa at point that is 2.5 meters beneath the center of a 3 meter x 4 meter footing? a. 7.504 kPab. 1.123 kPac. 2.945 kPad. 5.213 kPa
1. Fill in the blanks; (a) Theoretically, the vertical stress at surface under a point load is (b) The curve connecting all the points below the ground surface of equal vertical stress is called The distribution of vertical stress under uniformly loaded area of any (c) shape can be calculated with the help of ............
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A rectangular concrete slab, 3 m X 4.5 m, rests on the surface of a soil mass. The load on the slab is 2025 kN. Determine the vertical stress increase at a depth of 3 m (a) under the center of the slab, point A (see Figure); (b) under point B (see Figure); and (c) at a distance of 1.5 m from a corner, point C (see Figure). Compare your results with the Approximate Method and comment on the results. 4.5 m B 3 -1.5 m- Plan