Question 2a. A long horizontal drain at 3 m depth collects the ground water in a low-lying area. The freewater table coincides with the ground level and the flownet for the ground water flow isshown in Figure Qu2a. The 6 m thick sandy clay bed is underlain by an impervious stratum.-5Permeability of the sandy clay is 6.2x10 cm/s. Point X is at 1.5m below the free watersurfaceFree water table at surface5.133 m4.66 mDrain5.5Impervious stratumFigure Qu2ai. Find the discharge through the drain in m /day, per metre length of drain.3ii.Evaluate theporewaterpressureat point X.

Solution:- The given figure is shown below,

Answered: A long horizontal drain at 3 m depth…

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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A dam, shown in Figure 5 retains IO m of water. A sheet pile wall (cutoff curtain) on theupstream side, which is used to reduce seepage under the dam, penetrates 7 m into a 20 mthick silty sand stratum. Below the silty sand is a thick deposit of clay. The averagecoefficient of permeability of the silty sand is 2.0 x 10-4 cm/sec. Assume that the siltysand is homogeneous and isotropic.(i) Draw the flow net under the dam.(ii) Calculate the seepage rate, q per meter length of the sheet pile.
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