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

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

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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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
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