Direction: The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are: permeability coefficient = 0.09 m/day (isotropic), specific gravity = 2.70 and void ratio = 0.85. The sheet pile wall and the bottom of the soil are impermeable.
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The seepage loss (in m³ per day per unit length of the wall) of water is
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- 0.33
- 0.38
- 0.43
- 0.54
Correct Option: B
Nd – no of equip potential drops = 8 (Remember to count from zero)
Seepage loss,
| ∆q = k ∆H | Nd |
∆H = difference between upstream and downstream water level
= 10 – 1.5 = 8.5 m
∴ ∆q = 0.09 × 8.5 × (4/8) = 0.3825 m3/ day/ m2
