Consider the upward flow of water through a layer of sand in a tank as shown in the Figure below. For the sand, the following are given: void ratio (e) 0.52 and specific gravity of solids 2.67. Calculate the total stress, pore water pressure, and effective stress at points A and B. (G,+ e)yw Hint: 1+e Inflow 0.7 m * 2m MA 1 m Sand 1.5m Valve (open) 11 Cangage Learning 2014

Consider the upward flow of water through a layer of sand in a tank as shown in the Figure below. For the sand, the following are given: void ratio (e) 0.52 and specific gravity of solids 2.67. Calculate the total stress, pore water pressure, and effective stress at points A and B. (G,+ e)yw Hint: 1+e Inflow 0.7 m * 2m MA 1 m Sand 1.5m Valve (open) 11 Cangage Learning 2014

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter10: Stresses In A Soil Mass

Section: Chapter Questions

Problem 10.18P: Refer to the flexible loaded rectangular area shown in Figure 10.47. Using Eq. (10.36), determine...

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A soil profile is shown in Figure Q2 (a). Calculate the total stress, pore waterpressure and effective stress at points A, B, C and D. Hence, plot the variations of thestresses with depth. Given: H1 = 4.7 m H2 = 6.4 m H3 = 3.8 me= 0.55 Ysat= 19.1kN/m3 w= 24%Gs = 2.61 e= 0.64
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)
For the two-dimensional flow system shown below (units in meters): Express how you will calculate the total vertical stress (do not compute it).
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.
An earth embankment is shown in Figure 10.44. Determine the stress increase at point A due to the embankment load. Given: β = 25°, γ = 119 lb/ft 3, x = 55 ft, y = 28 ft, and z = 20 ft.
Refer to the figure below. Calculate the amount of increase in vertical stress Δσz at point A. Consider q1 = 90 kN/m, q2 = 325 kN/m, x1 = 4m, x2 = 2.5m, and z = 3m. Final answers should be in 3 decimal places.
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.
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.
Q: I an oedometer test on a specimen of saturated clay (Gs = 2.72), the applied pressure was increased from 107 1o 214 kPa and the following compression readings recorded: TaBLE| Tmen 0 025 05 1 225 4 &5 9 16 Guugelmm) 78 742 732 721 6% 678 &6 643 637 Teme(mi) 25 % 4 s om0 X0 a0 Guge(nm) 629 626 621 618 616 615 610 602 After 1440 min, the thickness of the specimen was 15.30 mm and the water content was 23.2%. Determine the values of the coefficient of consolidation and the compression atios from (a) the root time plot and (b) the log time plot. Determine also the values of the coefTicient of volume compressibility and the coefficient of permeability.
Use Eq. (6.14) to determine the stress increase () at z = 10 ft below the center of the area described in Problem 6.5. 6.5 Refer to Figure 6.6, which shows a flexible rectangular area. Given: B1 = 4 ft, B2 = 6 ft, L1, = 8 ft, and L2 = 10 ft. If the area is subjected to a uniform load of 3000 lb/ft2, determine the stress increase at a depth of 10 ft located immediately below point O. Figure 6.6 Stress below any point of a loaded flexible rectangular area
Refer to Figure 10.46. A flexible circular area of radius 6 m is uniformly loaded. Given: q = 565 kN/m2. Using Newmarks chart, determine the increase in vertical stress, z, at point A. Figure 10.46
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