Problem Ex. Consider the upward flow of water through a layer of sand in a tank as shown in Figure.1.5 m0.7 mI m2 mValve (open)InflowO SandFor the sand, the following are given: void ratio (e) = 0.52 and specific gravity of solids (G.) = 2.67.Calculate the total stress, pore water pressure, and effective stress at points A and B. What is the upwardseepage force per unit volume of soil?Total stress, porewater pressure, effective stress.Point At BTotal stress(kN/m?)PorewaterpressureEffectivestressUpward seepage force.

Answered: Image /qna-images/answer/f4b996ce-1483-45dc-94b6-aeb1a3083ce8.jpg

Answered: Problem Ex. Consider the upward flow of…

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter9: In Situ Stresses

Section: Chapter Questions

Problem 9.12P

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Refer to the flexible loaded rectangular area shown in Figure 10.47. Using Eq. (10.36), determine the vertical stress increase below the center of the loaded area at depths z = 3, 6, 9, 12, and 15 m. Figure 10.47
Consider the upward flow of water through a layer of sand in a tank as shown in Figure QI(c), For the sand, the following are given: void ratio (e) = 0.52 and specific gravity of solid = 2.67. Determine: (i) Total stress, pore water pressure and effective stress at points A and B (ii) The upward seepage force per unit volume of soil.
11. Consider the downward flow of water through a layer of sand in the tank shown. (see picture below) Void ratio of the soil = 0.52 Specific Gravity = 2.70 Compute the value of h1. (Answer: 0.436) Compute the effective stress at A. (Answer: 17.44 kPa) Compute the effective stress at B. (Answer: 31.98 kPa) Compute the seepage force per unit volume. (Answer: 3.57 kN/m3)
From the figure shown, H1 = 0.60, H2 = 0.90 m. and h = 0.45 m. The sad has a saturated unit weight of 18.65 kN/m3 . Hydraulic conductivity of sand K = 0.12 cm/sec. If the cross sectional area of tank = 0.46 m2 , determine the following: 1. Total stress and Effective stress at C. 2. Pore water pressure at C. 3. Rate of upward seepage of water in liters/sec.
Evaluate the figure shown and solve what is being asked in the problem with the following given: e = 0.42 G = 2.8 H1 = 0.3 m H2 = 3.3 m h1 = 0.9 m z = 1.2 m a. What is the saturated unit weight of sand in kN/m³? b. Calculate the total stress at point C in kPa. c. Calculate the effective stress at point B in kPa.
A soil profile is shown in Figure Q3(b)(i). The groundwater level is located on the ground surface. The sand layer is under artesian pressure where the excess pore water pressure is 40 kN/m^2. (i) Calculate the total vertical stress, pore water pressure and effective vertical stress at the base of each layer. (ii)Determine the increment of the effective stress at the base of sand layer if the 1.5m height fill will be imposed on the ground surface. Note that, the density of the fill material is 1750 kg/m^3. (iii) The excavation will be made in the clay layer for the basement construction. Evaluate the stability of the soil from boiling or quick condition. The depth of the excavation is shown in Figure Q3(b)(ii). (iv)Propose the maximum depth of cut that can be made to avoid boiling or quick condition.
A)Plot graphically all the vertical stresses, pore water and effective vertical stresses throughout the depth. B)How would the effective vertical stress value at the midpoint of the clay layer change if the groundwater level increased 2 m? (g = 10 m / s2)
A soil profi le consists of a clay layer underlain by a sandlayer, as shown in Figure P7.17. If a tube is inserted intothe bottom sand layer and the water level rises to 1 mabove the ground surface, determine the vertical effective stresses and porewater pressures at A, B, and C. IfKo is 0.5, determine the lateral effective and lateral totalstresses at A, B, and C. What is the value of the porewater pressure at A to cause the vertical effective stressthere to be zero?
Plz give the correct answer. Compute the intensities of active and passive earth pressure at depth of 8 m in dry cohesionless sand with an angle of internal friction of 30 degrees , and unit weight of 18kN / (m ^ 3) What will be the intensities of active and passive pressure if the water level rises to the level? Take the saturated unit weight of sand as 22kN / (m ^ 3) .
Subject: soil mechanics I want part b. Please help me with part b. Or can you answer both a and b ? A 10 ft diameter flexible loaded area is subjected to a uniform pressure of 1200 lbs/ft2. a. Plot the variation of the vertical stress increase beneath the center with depth z = 0 to 20 ft. b. In the same plot, show the variation beneath the edge of the loaded area.
4. A 10 m thick layer of shift, saturated clay is underlain by a layer of sand. The sand is under artesian pressure. (see picture below) Calculate the max depth of cut H, that can be made in the clay. (Answer: 6.9 m) Calculate the effective stress of A. (Answer: 58.9 kPa) Calculate the effective stress of B. (Answer: 19.225 kPa)
Determine the stress increase due to the embankment load at point A as shown in Figure 2. The unit weight of the embankment fill is 115pcf

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