The flownet at a site of a reservoir is shown in Figure P4.17. (a) How many flow channels are present? (b) How many equipotential drops are present? (c) What is the total head loss? (d) Calculate the head loss between each equipotential line. (e) Calculate the average flow rate if keg = 4 x 10-°cm/s (f) Calculate the porewater pressures at A and B located on opposite sides of the sheet pile retaining wall. (g) What would happen to the wall if the critical hydraulic gradi- ent at the bottom of it (C) is exceeded?

The flownet at a site of a reservoir is shown in Figure P4.17. (a) How many flow channels are present? (b) How many equipotential drops are present? (c) What is the total head loss? (d) Calculate the head loss between each equipotential line. (e) Calculate the average flow rate if keg = 4 x 10-°cm/s (f) Calculate the porewater pressures at A and B located on opposite sides of the sheet pile retaining wall. (g) What would happen to the wall if the critical hydraulic gradi- ent at the bottom of it (C) is exceeded?

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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Concept explainers

Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.

Question

122
CHAPTER 4 ONE- AND TWO-DIMENSIONAL FLOWS OF WATER THROUGH SOILS
8 x 10-'cm/s, 4 x 10-3cm/s and 5 x 10-cm/s. Assuming that the ratios of the lateral to the
vertical hydraulic conductivities of the top, middle, and bottom layers are 2, 3, and 4 respectively,
calculate the equivalent hydraulic conductivity of the sand.
Critical thinking and decision making
4.17 The flownet at a site of a reservoir is shown in Figure P4.17. (a) How many flow channels are
present? (b) How many equipotential drops are present? (c) What is the total head loss? (d)
Calculate the head loss between each equipotential line. (e) Calculate the average flow rate if
keg = 4 x 10-cm/s (f) Calculate the porewater pressures at A and B located on opposite sides
of the sheet pile retaining wall. (g) What would happen to the wall if the critical hydraulic gradi-
ent at the bottom of it (C) is exceeded?
Water
Sheet pile retaining wall
4 m
Reservoir
1.5 m
3 m
5.5 m
Clayey sand /
Impervious clay

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