SITUATION: The coefficient of permeability belowa dam is 4m/day. The water on the upstream side is 20m higher than on the downstream side. To estimate the seepage below the dam, a lownet was graphically drawn such that the number of potential drops Nd310 and number of flow channels Nf=4. The base of the dam is founded 1m below the ground. Between the heel and the toe of the dam, a distance of 30m, there are 8 potential drops. Evaluate the seepage flow per meter width of the dam in liters per minute. 22 30 25 45

SITUATION: The coefficient of permeability belowa dam is 4m/day. The water on the upstream side is 20m higher than on the downstream side. To estimate the seepage below the dam, a lownet was graphically drawn such that the number of potential drops Nd310 and number of flow channels Nf=4. The base of the dam is founded 1m below the ground. Between the heel and the toe of the dam, a distance of 30m, there are 8 potential drops. Evaluate the seepage flow per meter width of the dam in liters per minute. 22 30 25 45

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The coefficient of permeability below a dam is 12 m/day. The water in the upstream side is 32 meter higher than on the downstream side (level with the ground). To estimate the seepage below the dam, a flow net is graphically drawn such that the number of potential drops, Nd = 8 and the number of flow channels Nf = 3. The base of the dam is founded 1.8 m below the ground. Between the heel and the toe of the dam, a distance of 32 meters, there are 6 potential drops. a. Estimate the seepage per meter length of the dam in liters per minute. (IN EXPONENTIAL FORM AND IN 2 DECIMAL PLACES) b. Determine the uplift pressure at the heel in kPa. (IN 2 DECIMAL PLACES) c. Determine the uplift pressure at the toe in kPa. (IN 2 DECIMAL PLACES)
Please show a complete solution and avoid rounding off intermediate values.
A masonry dam as shown has a coefficient of permeability in the vertical and horizontal direction of Kz=4.5m/day and Kx=6m/day, respectively. Assume length into the paper =35m and base width = 40m. 24 m a) Determine the seepage (lit/sec) into the downstream side per meter of the dam. 0.525 lit/sec b) Calculate the average of the pressure of the toe and heel of the dam in kPa. c) Calculate the total uplift force in x10^3 kN.
Question attached
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S1
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From the figure shown, the thickness of a permeable soil layer is 1.1m making an angle of 15degrees with the horizontal. Given that k = 3.78x10^(-2) cm/sec and e=0.6, a. Compute the hydraulic gradient. b. Compute the flow rate in m3/hr c. Compute the seepage velocity.
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Flow.net,.
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