A flow net for flow around a single row of sheet piles in a permeable soil shown in Figure 8.7. Given that k, = k = k = 5 x 10-³ cm/s, determine a. How high (above the ground surface) the water will rise if piezomet placed at points a and b b. The total rate of seepage through the permeable layer per unit length c. The approximate average hydraulic gradient at c Water level Ground surface 5.6 m m H b 2.2 m Wa Fl Fl Fl

A flow net for flow around a single row of sheet piles in a permeable soil shown in Figure 8.7. Given that k, = k = k = 5 x 10-³ cm/s, determine a. How high (above the ground surface) the water will rise if piezomet placed at points a and b b. The total rate of seepage through the permeable layer per unit length c. The approximate average hydraulic gradient at c Water level Ground surface 5.6 m m H b 2.2 m Wa Fl Fl Fl

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

Principles of Seepage

In hydrology, when water flows down in a pore or crack of unsaturated soil due to gravity, the deep layer of soil is called seepage. It is the slow movement of water in the soil layer. Seepage is mainly found near hydraulic structures and is responsible for the stability of earthen-type hydraulic structures.

Question

EXAMPLE 8.2
A flow net for flow around a single row of sheet piles in a permeable soil layer is
shown in Figure 8.7. Given that k, = k = k = 5 x 10-³ cm/s, determine
a. How high (above the ground surface) the water will rise if piezometers are
placed at points a and b
b. The total rate of seepage through the permeable layer per unit length
c. The approximate average hydraulic gradient at c
Water level
Ground surface
Scale
5 m
5.6 m
2.2 m
Water table
Flow channel 1
Flow channel 2
Flow channel 3
Impervious layer
FIGURE 8.7 Flow net for seepage around a single row of sheet piles
b
1/
b
= 1
= 1
1 1
T
0.38

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