Sheet pile k= 4 x 10-4 cm/sec Impermeable layer Figure 8.23 8.2 Draw a flow net for the single row of sheet piles driven into a permeable layer as shown in Figure 8.23. Given: • H₁ = 3 m D = 1.5 m • D₁ = 3.75 m • H₂=0.5 m Calculate the seepage loss per meter length of the sheet pile (at right angles to the cross section shown).

Sheet pile k= 4 x 10-4 cm/sec Impermeable layer Figure 8.23 8.2 Draw a flow net for the single row of sheet piles driven into a permeable layer as shown in Figure 8.23. Given: • H₁ = 3 m D = 1.5 m • D₁ = 3.75 m • H₂=0.5 m Calculate the seepage loss per meter length of the sheet pile (at right angles to the cross section shown).

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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Flow 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.
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29. Seepage takes place beneath a concrete dam shown below resting on a fine, sandy silty soil having a permeability of 5 X 10-4 cm/s and a saturated unit weight of 19 KN/m3. A sheet pile is also provided at the upstream end of the dam in an attempt to reduce the seepage. Determine the quantity of seepage in m3/day per meter width, the safety factor with respect to piping, and the uplift thrust on the dam. 25 m 6m 1.75 m. 3.5 m 20 m 10 Impervicus stratum Fig 29 - Prob 29
Q-4: The following figure shows the flow net for seepage of water around a single row of sheet piles driven into a permeable layer. Calculate how deep the sheet pile should be driven (h) to achieve factor of safety = 3 against downstream heave, given that ysat for the permeable layer = 18 kN/m3. (Note: Thickness of permeable layer T = 18 m) H₁ = 10 m (h) Heave zone Sheet pile ►||1| Impermeable layer H₂ = 2 m Ysat 18 kN/m³
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Problem (3) The flow net for water seepage is shown in the figure below, where the permeable soil layer has a saturated unit weight: %a-17.7 kN/m°. Calculate: a) Seepage force per unit volume Sheet pile H = 3 m Heave zone На 0.5 m Ysat = 17.7 kN/m3 rmeable layer Figure 6.9 Flow net for seepage of water around sheet piles driven into permeable layer
6.12 For the same dam and the same soil conditions as in Problem 6.11, a 4-meter-long vertical sheet pile is added at the left end of the dam base: (a) Draw the flow net by using N, = 3. (b) Compute the flow rate q under the dam. (c) Compute the water pressures at the heel (A) and toe (B) sections of the base of the dam based on the drawn flow net. 20.0 m z (m) 17.0 12.0 10.0 8.0 4.0 Sandy soil k=0.0035 cm/sec
Question 1/ Longitudinal trench to be excavated across the river with length 40m and depth 5m as shown in Figure (1), estimate the capacity of the pump that required to keep the area of the field dry, knowing that k = ky = 2.5 x 10-3 m/h. %3D Sheet piles Impervious Figure (1)