Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Question
Chapter 7, Problem 7.4P
To determine
Draw the flow net.
Find the seepage loss per meter length of the sheet pile.
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Determine the total flow rate through all channels per unit length of the
respective Flownet of sheet pile. Given coefficient of permeability, k = 2.8
x10-5 cm/s (refer Figure above)
h = 30 m
h2= 10 m
O 0.0021 cm2/s
O 0.00125 cm2/s
O 0.0056 cm2/s
O 0.0028 cm2/s
HOMEWORK
P1:
For a given sheet pile driven into a permeable soil layer underlain by an impermeable clay layer,
(a) Draw the flow net by using Nf= 3.
(b) Compute the flow rate q around the sheet pile.
Sheet pile
h=3.5 m
1.5 m
H=5 m
H=10 m
Sandy soil
k=0.0035 cm/sec
Impervious Layer
Answer: (b) q = 0.583 cm3/s/cm
Refer to Figure 8.23. Given:• H1 = 6m• H2 = 1.5 m• D = 3 m• D1 = 6 mDraw a flow net. Calculate the seepage loss per meter length of the sheet pile (at a right angle to the cross section shown).
Chapter 7 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Example A flow net for flow around single row of sheet piles in a permeable soil layer is shown in the figure. Given Sheet pile kx = k = k = 5xl10-3 cm/sec. Determine: 1. How high (above the ground 0 surface) the water will rise if piezometers are placed at points a, b, c, and d. 2. The total rate of seepage II II -4.5 Nr= 3 through the permeable layer per unit width. 3. The rate of seepage through the flow channel II per unit width (perpendicular to the section shown) -9.0 Datum Imnermeahle laverarrow_forwardA flow net for flow around a single row of sheet piles in a permeable soil layer is shown in the Figure below. Given that kx= kz = k= 5.5 x 10-3 cm/sec, H1 = 6.5 m and H2 = 2.3 m determine: i. How high (above the ground surface) the water will rise if piezometers are placed at points a and b ii. The total rate of seepage through the permeable layer per unit length iii. The approximate average hydraulic gradient at carrow_forwardPROBLEM No. 5 The section of a sheet pile is shown in figure below. The coefficient of permeability of the soil is k = 4.2 x 103 m/s. Determine the seepage into the downstream side per meter length of the sheet pile.arrow_forward
- Given h = 30 m, D= 40 m and the soil beneath the dam has a hydraulic conductivity of 3x10-3 cm/s. Compute 1) pore pressure at point b, and 2) the flow rate under the sheet pile. given = h = 30m NF No D=40m *units meters 0.8h h 30 640 0.7h Sheet pile D12-c 0.6h 0.5h 0.4h 0.2harrow_forwardGiven h = 30 m, D= 40 m and the soil beneath the dam has a hydraulic conductivity of 3×103 cm/s. Compute 1) pore pressure at point b, and 2) the flow rate under the sheet pile. given = h = 30m D=40m NF No *units meters 0.8h h 30 640) 0.7h 0.6h 0.5h Sheet pile D12-c 7777 0.4h b 0.34 0.2harrow_forwardThe sheet pile shown on the figure below is driven into a soil with a permeabilityk = 22 × 10-4 cm/s. Calculatea- the seepage loss per metre lengthb- the pore water pressure at the 12 points shown on the figure.arrow_forward
- The dam and flow net shown in the attached picture. The dam is 120 m long and has two 10 m sheet piles driven partially into the granular soil layer. Datum is at tailwater elevation. Determine: 1. The quantity of seepage loss under the dam when k= 20*10^(-4) cm/s 12 m 10 m sheet pile 10m sheet pille 85m 30 m Impervious - O C 0.4 1 Scale: Number al equipotential dropsarrow_forwardFlow Nets A single row of sheet piles is driven into a permeable layer as shown in the figure. Given: • Hị = 5.5 m • H2 = 4.4 m Calculate the seepage loss per meter length of the sheet pile (at right angles to the cross section shown). Bear in mind that in the flow net of the system the number of flow channels is Nf = 4 and the number of potential drops is Na = 8. + Sheet pile H H2 D k = 4 × 10-4 cm/sec Impermeable layer Round your final answer to three significant figures. ® m³/ day /m 1.arrow_forwardA 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_forward
- 5- 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 H1 H Impervious base 6- The Repeat Problem 5 using Casagrande's method.arrow_forwardQ1#: 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. Use paint or graph paper. SIR PLS, GIVE ME PROPER AND CORRECT ANSWER WITH FULL DETAILS AND ALSO USE PAINT OR GRAPH PAPER. THANKSarrow_forwardProblem (2) a) Find the quantity of discharge q per meter width for the sheet pile given in the figures below, knowing that the soil has permeability of: k,= k,=22*10“cm/s b) Find pressure heads at 12 points as shown in figure. Provide the solution in a tabulated form for values of dissipated head and total head. c) Find the hydraulic gradient at exit (between point 11 and 12) Elevation (m) 100.0 Sheet piling 7 m 12 93.0 11 91.4 4 10 7 m 89.4 59 87.4 86.3 86.0 7 6 m 80.0 Imnervinusarrow_forward
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