Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN: 9781305081550
Author: Braja M. Das
Publisher: Cengage Learning
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Chapter 2, Problem 2.12P
To determine
Calculate the total stress, pore water pressure, and effective stress at A, B, C, and D.
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Refer to the soil profile shown in Figure 6.25. Given H1 = 4 meter and H2 = 3 meter. If the ground water table rises to 2 meter below the ground surface,what will be the net change in effective stress at the bottom of the claylayer?
Q-2 For the soil profile shown in the figure below calculate and plot the total stress, pore water pressure and effective stress at points A, B, C and D. Give the following Data :
Problem 2
Plot the stress profile for total stress, effective stress, and pore water pressure. Show all calculation.
Diy sand
0.61
Saturated sand
0.48.
G-267
Clay
Chapter 2 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 2 - Prob. 2.1PCh. 2 - Prob. 2.2PCh. 2 - Prob. 2.3PCh. 2 - Prob. 2.4PCh. 2 - Prob. 2.5PCh. 2 - Prob. 2.6PCh. 2 - Prob. 2.7PCh. 2 - Prob. 2.8PCh. 2 - Prob. 2.9PCh. 2 - Prob. 2.10P
Ch. 2 - Prob. 2.11PCh. 2 - Prob. 2.12PCh. 2 - Prob. 2.13PCh. 2 - Prob. 2.14PCh. 2 - Prob. 2.15PCh. 2 - For a normally consolidated soil, the following is...Ch. 2 - Prob. 2.17PCh. 2 - Prob. 2.18PCh. 2 - Prob. 2.19PCh. 2 - Prob. 2.20PCh. 2 - Prob. 2.21PCh. 2 - Prob. 2.22PCh. 2 - Prob. 2.23PCh. 2 - Prob. 2.24PCh. 2 - Prob. 2.25PCh. 2 - Prob. 2.26PCh. 2 - Prob. 2.27P
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- The diagram below shows a multi-layered soil, write an expression for the stress at each layer and the vertical total stress at depth z. (all symbols have their usual meaning)arrow_forwardA soil profile is shown in figure below. Calculate the following:a. Effective stress at point A in kPa.b. Effective stress at point B in kPa.c. Effective stress at point C in kPa.arrow_forwardFor the stressed soil element shown below, determinea. Major Principal Stress in psi.b. Minor Principal Stress in psi.c. Normal Stress at Failure Plane AE in psi.d. Shear Stress at Failure Plane AE in psi.arrow_forward
- Calculate and then plot the change in total stress, effective stress and pore water pressure with the plate for the soil layers shown in the figure below and according to the conditions: • There is no effect of capillary action • There is an effect of capillary action at a distance of 2m above the water level in the sandy layerarrow_forwardPlot the stress profile for total stress, effective stress and pore water pressure. Show all calculation A Diy sand 0,61 2.66 41 Salurated sand, =0.48° 2.67 Clayarrow_forwardCalculate and then plot the change in total stress, effective stress and pore water pressure with the plate for the soil layers shown in the figure below (no run-off)arrow_forward
- Civil engineering question A sample of soil (0.2 m x 0.2 m) is subjected to forces as shown. Determine the principal stresses and the stresses oriented at 30 degrees counter clockwise from the major principal stress plane.arrow_forward7. Figure 2 shows the Total Stress and Effective Stress Diagram of a soil profile Effective Stress (kN/m²) Total Stress (kN/m²) 100 100 Depth (m) 1 2 7 8 9 10 50 42 56 86 150 200 Depth (m) 1 2 3 4 7 8 9 10 50 42 56 66 94 150 200 154 Figure 2. Total stress and effective stress diagram a. Based on the diagram, what is the elevation of the groundwater table? b. If the unit weight of water is 10 kN/m^3, what is the unit weight of the saturated layer between 4 and 6 m deep? c. What are the impacts of rising and falling groundwater levels? Explain your answer and give some examples.arrow_forwardSolve the following problems. Provide complete solutions and summary of answers. The water table in soil deposit is 2 meters below the ground surface. The soil above the water table has a dry unit weight of 14.85 kN/cu. Meter. The saturated unit weight of the soil is 20.58 kN/cu.meter. Determine the following: a. Total Stress at a point 4.80 meters below the ground b. Total Pore pressure 4.80 meters below the ground c. Total effective stress at a point 4.80 meters below the ground.arrow_forward
- Problem # 3. The figure show a granular soil in the tank having downgrade seepage. The water level in the tank is held constant by adjusting the supply from the top and outflow at the bottom. a. Determine the total stress at the bottom.b. Find the pore or water pressure at the bottom.c. Compute the effective stress at the bottom.arrow_forwardFigure 2 shows the zone of capillary rise within a clay layer above the groundwater table. Using: H1 = 3 m., H2 = 2 m., H3 = 4 m. a.What is the value of the total stress 9m below the ground surface in kPa? b.What is the value of the effective stress 5m below the ground surface in kPa? c.What is the value of the effective stress 9m below the ground surface in kPa?arrow_forwardQuestion 20 A soil profile consists of sand (5-m thick) which overlies a layer of clay (9-m thick). Ground water table is located at the interface of the sand and clay. The effective stress at the bottom of the clay layer was determined. 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? For sand layer: Void Ratio = 0.82, Specific gravity = 2.68, Degree of Saturation = 0.6 For clay layer: Void Ratio = 0.92, Specific gravity = 2.86 Round off to two decimal places.arrow_forward
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