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 2, Problem 2.9P
To determine
Find the seepage quantity across the entire wall per day.
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EXAMPLE 8.3
Seepage takes place around a retaining wall shown in Figure 8.8. The hydraulic con-
ductivity of the sand is 1.5 × 10-3 cm/s. The retaining wall is 50 m long. Determine
the quantity of seepage across the entire wall per day.
FIGURE 8.8
5 m
Retaining wall
Impervious layer
Sand
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Principles of Foundation Engineering (MindTap Course List)
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- From the figure shown, H₁ = 0.60, H₂ = 0.90 m. and h = 0.45 m. The sand 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 total stress at point C in KPa. h=0.45m T H₁-0.60 m H₂-0.90 m Direction of flow H₂O Sand 1265 valve openarrow_forwardFrom 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.arrow_forwardSeepage takes place around a retaining wall shown in Figure Q5. The coefficient of permeability of the sand is 3×10−3 cm/s. If the retaining wall is 20m long, calculate the quantity of seepage across the entire wall per day.arrow_forward
- Seepage around a retaining wall is shown in the figure below. The hydraulic conductivity of the sand is 1.8 x 10-5 cm/s. The retaining wall is 20 m long. Determine the quantity of seepage across the entire wall per dayarrow_forwardCalculate the equivalent hydraulic conductivity in horizontal and vertical direction for the soil profile shown in Figure Q3. [Hint: Assume head loss of each layer is equal to its thickness (zi=hi)].arrow_forward2.8 A 500 m long levee made of compacted clay impounds water in a reservoir as shown in Figure P2.8. There is a 1 m thick (measured in the direction perpendicular to the seam) sand seam continuing along the entire length of the levee, at 10° inclination to the horizontal, which connects the reser- voir and the ditch. The hydraulic conductivity of the sand is 2.6 × 10-³ cm/s. Determine the volume of water that flows into the ditch every day.arrow_forward
- 3. The upward flow of water through a layer of sand in the tank shown in figure has the following properties: e =0.50, G-2.67. Determine the following: a) Effective stress at point A b) Effective stress at point B c) Upward seepage force per unit volume of soil 0.8m 3.5m Supply of Water 0.5m A B 1.9marrow_forwardRefer to Problem 8.4. Using the flow net drawn, calculate the hydraulic uplift force at the base of the hydraulic structure per meter length ( measured along the axis of the structure).arrow_forwardRefer to Problem 8.4. Using the flow net drawn, calculate the hydraulic uplift force at the base of the hydraulic structure per meter length (measured along the axis of the structure).8.24 For the hydraulic structure shown in Figure 8.24, draw a flow net for flow through the permeable layer and calculate the seepage loss in m3/day/m.arrow_forward
- Problem 7.4 only.arrow_forwardA layered soil is shown in (Figure 1). Estimate the ratio of equivalent hydraulic conductivity, kH(eq)/kV(eq). Q2 1.5 m k = 2 x 10-3 cm/sec (top layer) | k = 2 × 10-4 cm/sec | k = 10-4 cm/sec k= 3 x 10-4 cm/sec (bottom layer) (N 1.5 m I m SCarrow_forward8.5 For the hydraulic structure shown in Figure 8.19, draw a flow net for flow through the permeable layer and calculate the seepage loss in m/day/m Refer to Problem 8.5. Using the flow net drawn, calculate the hydraulic uplift force at the base of the hydraulic structure per meter length (measured along the axis of the structure) 8.6 25 m 10m 3.34 m 1.67 m 20 m k 0.002 em/sec I I 167 m 167 m Impermeable layer Permeable layer Figure 8.19 10uatetuaarrow_forward
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