PE-08-Dams-Levees

PE-08-Dams-Levees - Solved Problems in Dams and Levees 01...

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185 Solved Problems in: Dams and Levees 01: Uplift pressures upon a concrete levee. 02: Uplift pressures upon a concrete dam.

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186 *Dams-01: Find the uplift pressure under a small concrete levee. (Revision: Sept.-08) Calculate the uplift force at the base of the weir, per foot of width. Points A and B are at the corners of the concrete levee. Solution: The dynamic head drop per equipotential is, 30 5 ( ) 1.8 / 14 Pressure head at A = 30 ft + 8 ft - h (1.5) = 35.3 ft Pressure head at B = 30 ft + 8 ft - h (10) = 20.1 ft The upli A B eq H H ft ft h ft drop N drops - - Δ Δ = = = Δ Δ ( ) 3 16 fting force is, 35.3 20.1 98 ' 62.4 169,000 2 2 9 A B w F p p lb lb F L ft ft kip ft γ + + ± ± = = = = ² ³ ² ³ ´ µ ´ µ
187 *Dams-02: Determine the uplift forces acting upon a concrete dam. (Revision: Aug-08) The uplift (hydrostatic) force under the concrete gravity dam shown below varies as a straight line from 67% of the headwater pressure at the heel, to 100% of the tail- water at the toe. Assume

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PE-08-Dams-Levees - Solved Problems in Dams and Levees 01...

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