Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 7, Problem 7.6P
To determine
Draw the flow net.
Find the rate of seepage under the weir.
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Draw a flow net for the weir shown in Figure 8.20. Calculate the rate of seepage
under the weir.
37 m
10 m
m
m
Sheet pile
24 m
k- 10-3 cm/sec
Impermeable layer
Figure 8.20
Draw a flow net for the weir shown in Figure below. Calculate the rate of seepage under the
weir.
37 m
10 m
1.5 m
9 m
Sheet pile
24 m
k = 10-3 cm/sec
Impermeable layer
For the concrete Dam shown in figure, determine the total average seepage for the given permeable strata by drawing Flow Net. The detail dimensions are given on the figure. The head of water on upstream side is 6ft and on downstream side is 1ft. Assume of Nf= 3, Nd= 6 and rectangular flow elements
Chapter 7 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- Draw a flow net for the weir shown in Figure B, then calculate the rate of seepage under the weir. In addition, evaluate the exit gradient in the first flow channel of the last field against the critical gradient. Assume e = 0.60, and G, = 2.60, 37 m 10 m 1.5 m 3 m 9 m Sheet pile 24 m k = 1 x 10-3cm/sec Impermeable Layerarrow_forwardA pipe culvert 45 ft long extends between two reservoirs as shown below. The difference in the water surface elevation (Ah) between the two reservoirs is 21.7 ft. The pipe is 5.0 ft in diameter and has a friction factor of 0.04. Calculate the discharge in the pipe if the entrance loss coefficient is 0.5 and the exit loss coefficient is 1.0. L Aharrow_forwardShow complete solution(need ASAP): The coefficient of permeability below a dam is 4 m/day. The water on the upstream side is 20 m. higher than on the downstream side. To estimate the seepage below the dam, a flow net was graphically drawn. The base of the dam is founded 1 meter below the ground. Between the heel and the toe of the dam, a distance of 30 m, there are 8 potential drops. a. Evaluate the seepage flow per meter length of the dam in cu.m per day. b. Compute the uplift force per unit length along the axis of the dam in kN/m. c. Determine the position of the uplift force from the toe of the dam in m.arrow_forward
- A1arrow_forward5- An earth dam is shown below. Determine the seepage rate, q, in ft/day/ft length. Given: a1=35°, az=40°, L1=5 ft, H=7 ft, Hj=10 ft, and 3X104 ft/sec. Water level k H a2 Impervious basearrow_forwardA concrete pipe culvert 3 ft in diameter and 10 m long has a difference in water level at the outlet 1.52 m. What is the discharge? Assume coefficient of discharge C = 0.74 1.52 L=10m 28.57 m^3/s 2.66 m^3/s 50.78 m^3/s 4.72 m^3/sarrow_forward
- Figure D shows a diagram of the flow net of water for the weir. if the permeability of the permeable layer is 1.02 x 10-5 and H= 10 m, what is the rate of seepage under the weir? Answer in 7 decimal without unit. Unit in m3/s. 1||4 1 1 Figure D: Flownet at site ABC Toearrow_forwardThe flow net under a hydraulic structure has 5 flow channel with 10 equipotential drops. If the permeability of the bed material is 1.5 *10^-4 m/sec, find the quantity of seepage per meter width of the structure in m ^ 2 /sec under 3m head.arrow_forwardQuestion 8 Find the flow rate in m'/sec/m length (at right angles to the cross section shown) through the permeable soil layer shown in Figure Q8 given H=8 m, H1=3 m, h-4 m, L=50 m, a-8°, k-0.08 cm/sec. Direction ఆf tow O Empervious layer Permeable layer Figure Q8. Name / ID number: Answer:arrow_forward
- A flownet for flow around a single row of sheet piles in a permeable soil layer is shown in Figure 1 below. Given the hydraulic conductivity is 5 x 10-3 cm/sec. Determine:arrow_forwardThe head lost in 150 ml of 0.3 m pipe having sand- grain roughness projections 2.5 mm high is 12 m for a flowrate of 0.28 m^3/s. What head loss can be expected when the flowrate is 0.56 m^3/s?arrow_forwardThe weir shown below is 50 m long Draw a flow net for the flow under the weir Calculate the rate of seepage for the entire weir. Calculate the total uplift force acting on the weir base. Calculate the exit hydraulic gradient near the toe of the weir 37 m 10 m ==1,5 m 3 m 9 m Sheet pile > 24 m k = 10–3 cm/sec Impermeable layerarrow_forward
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