An excavation is proposed for a square area near the bend of a river as shown in Fig.P6.9. It is expected that the flow of water into the excavation will come through the siltlayer. Pumping tests reveal an average horizontal hydraulic conductivity of 2 x 10 cm/sin the silt layer. The excavation has to be kept dry. Determine the flow rate (q) into theexcavation.12.8 mRiver8 mAverage width 10.4 mExcavationPlanSlo4 mExcavationSiltCross section a-a.Not to scale

Given k=2×10-5,slope=1V:1.2H excavated area (A)=a+b2×y3 where a=8m,b=12.8m,y=depth of excavation

Answered: Ihe excavation has to be kept dry.…

Engineering

Civil Engineering

Ihe excavation has to be kept dry. Determine the flow rate (q) nto the

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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Question

An excavation is proposed for a square area near the bend of a river as shown in Fig.
P6.9. It is expected that the flow of water into the excavation will come through the silt
layer. Pumping tests reveal an average horizontal hydraulic conductivity of 2 x 10 cm/s
in the silt layer. The excavation has to be kept dry. Determine the flow rate (q) into the
excavation.
12.8 m
River
8 m
Average width 10.4 m
Excavation
Plan
Slo
4 m
Excavation
Silt
Cross section a-a.
Not to scale

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