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MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 1 term (6 months)
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ISBN: 9781305971226
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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Chapter 8, Problem 8.10P
To determine
Find the seepage rate through the dam q, in
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Refer to the cross section of earth dam shown in figure ,Calculate the rate of
seepage q in m3/min /m for the earth dam by using scahffernak's method?
5 m-
IV: 2H
IV: 2H
30 m
25 m
k = 3 x 104 m/min
Impermeable layer
Refer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m3/ min / m) using L.
Casagrande's method.
K 5 m
1V: 2H
30 m
1V: 2H
25 m
k = 3 x 10-4 m/min
Impermeable layer
Select the correct response:
5.91 x 103 m/min/m
2.37 x 103 m3/min/m
11.4x 104 m/min/m
29.5 x 104 m3/min/m
Refer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m^3 / min / m) using L. Casagrande’s method
Chapter 8 Solutions
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- Consider the figure of a dam shown below. The soil underneath the dam foundation has a coefficient of permeability, k = 3.5 x 103 cm/s. The water head on the upstream side is 15 m, and on the downstream side is 1 m. Compute the daily seepage underneath the dam if the length of the dam is 400 m. (Hint: draw the flow net) DAM 15 m 1 marrow_forwardRefer to the cross section of the earth dam shown below. Calculate the rate of seepage through the dam (q in m/min/m) using Schaffernak's and Casagrande's solutions. +7 m→| 3 m G.W.T. 1 32 m 2.0 2.0 Impermeable layerarrow_forward12 Determine the quantity of seepage under the dam cross section shown in m3/s/m if the soil has hydraulic conductivity, k=0.0001 meter cube per second. Note the numbers in the figure from left to right are:2.0m, 1.8m, 2.4m and 8.0 m, respectively. 2.00m 8.00 m 1.80 m Datum 12.40m 777 Enter your answerarrow_forward
- in figure below , a flow net is showing underneath a reinforced concrete dam .the permeability (k ) of the soil underneath the dam is 5*10 " m/s. Find the flowing: |a-the rate of seepage in m’/s if the dam is 350 m in length. b-the volume in (m3) of water loss underneath the dam in one year . the pore water pressure (u) at location A ,B ,C, D. -7 15 m A 30 m 18 m 12 m 10marrow_forwardRefer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m/ min /m) using L. Casagrande's method. +5 m 1V: 2H 30 m 1V: 2H 25 m k = 3 X 104 m/min Impermeable layer Round your final answer to three significant figures. q = ×10-4 m³/ min /marrow_forwardTake note: Answer and write your solution on a clean paper clearly. During a flood flow the depth of water in a 12 m wide rectangular channel was found to be 3.5 m and 3.3 m at two sections 300 m apart. The drop in the water-surface elevation was found to be 0.18 m. Assuming Manning’s coefficient to be 0.023, determine the following: a. Average value of k? b. Estimate the flood discharge through the channel ?arrow_forward
- Nf : 5 Nd=16 25 m Question 4 Seepage take place beneath a concrete dam as shown in Figure 2. The soil beneath the dam is a fine silty sand with hydraulic conductivity of 4.2 x 10“cm/s and saturated unit weight of 19.5 kN/m³. 6 m 1.75 m: 1) Find the rate of seepage beneath the dam in m³/day/m 2) If a standpipe piezometer is installed at the tip of the sheet pile, how high will the water rise? Impervious stratumarrow_forwardA section of a homogeneous earth dam is shown in the Fig.1. Calculate the seepage discharge per metre length, through the body of the dam. The coefficient of permeability of the dam material may be taken as 8 x 10-$ m/s. Apply 6. 4m Free board 2m 2:1 14m 12 m 2-5:1arrow_forward6. The sludge hopper of a sedimentation tank is approximated as a truncated square prism provided with an orifice of 100 mm dia. at its bottom as shown in the figure. The sludge is being discharged through the orifice Determine the time taken for emptying the hopper. Assume Cd=0.62. 2m 1m E im -arrow_forward
- An earth dam of homogeneous section with a horizontal filter is shown in Fig. below. If the coefficient of permeability of the soil is 3 x 10³ mm/s, Draw seepage line and find the quantity of seepage per unit length of the dam. Seepag 30 m 8m 200 m K 45 marrow_forward(b) Seepage takes place beneath a concrete dam as shown in Figure Q3. The soil beneath the dam is fine silty sand with hydraulic conductivity (permeability) of 4.2 x 10- cm/sec and saturated unit weight of 19.5 kN/m³. i. Calculate the rate of seepage beneath the dam in m/day/m. ii. If a standpipe (piezometer) is installed at point A, how high will the water rise? i. Calculate the pore water pressure at point A. R1.75m Impervious stratum Figure Q3arrow_forwardProblem (1) Find the quantity of discharge q in meter cube per second per meter width for the concrete dam given in the figure below, knowing that the soil has permeability of: k,= k,=30*10*cm/s 20 m 6.5 m Concrete 1 m 10.5 m AYAVAYAYA Imperviousarrow_forward
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