Determine the rate of seepage (in cubic feet/min) under the dam by drawing flow net to scale, and also determine the total uplift force (in psf) acting at the bottom of the dam at Points B and D per unit length of dam. The permeability of the silty sand is 0.2 ft/min. The drawing is to scale. Use scaled drawing (next page) for your flow net sketching and pressure calculations/evaluations. Upstream water level is at El. 94 ft. Downstream water level is at El 68 ft. Dam is 85 ft long and bottom is at el 60 ft. Ground surfaces on both upstream and downstream sides are at El 64 ft.
Determine the rate of seepage (in cubic feet/min) under the dam by drawing flow net to scale, and also determine the total uplift force (in psf) acting at the bottom of the dam at Points B and D per unit length of dam. The permeability of the silty sand is 0.2 ft/min. The drawing is to scale. Use scaled drawing (next page) for your flow net sketching and pressure calculations/evaluations. Upstream water level is at El. 94 ft. Downstream water level is at El 68 ft. Dam is 85 ft long and bottom is at el 60 ft. Ground surfaces on both upstream and downstream sides are at El 64 ft.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Determine the rate of seepage (in cubic feet/min) under the dam by
drawing flow net to scale, and also determine the total uplift force (in psf)
acting at the bottom of the dam at Points B and D per unit length of dam. The
permeability of the silty sand is 0.2 ft/min. The drawing is to scale.
Use scaled drawing (next page) for your flow net sketching and pressure
calculations/evaluations. Upstream water level is at El. 94 ft. Downstream
water level is at El 68 ft. Dam is 85 ft long and bottom is at el 60 ft. Ground
surfaces on both upstream and downstream sides are at El 64 ft.
Transcribed Image Text:120
85 Ft
20'
40
loot E1g4+
257
80
EL 68 FF
El,G4 Ft
160
A -
40t
20+
Rock
ETEVATIO
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