   Chapter 8, Problem 8.4P Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939

Solutions

Chapter
Section Principles of Geotechnical Enginee...

9th Edition
Braja M. Das + 1 other
ISBN: 9781305970939
Textbook Problem

For the hydraulic structure shown in Figure 8.24, draw a flow net for flow through the permeable layer and calculate the seepage loss in m3/day/m. To determine

Draw the flow net for flow through the permeable layer and calculate the seepage loss in m3/day/m.

Explanation

Given information:

The hydraulic conductivity of the permeable soil layer k is 0.002cm/sec.

The head difference between the upstream and downstream H is 10 m.

The height of the water level H2 is 3.34 m.

The depth of permeable layer up to the tip of the hydraulic structure D is 1.67 m.

The depth of permeable layer D1 is 20 m.

Calculation:

Draw the free body diagram of the flow net for the given values as in Figure 1.

Determine the seepage loss per meter length of the sheet pile using the relation.

q=kHNfNd

Here, Nf is the number of flow lines and Nd is the number of potential drops.

Refer Figure 1.

The number of flow lines are 5 and number of potential drops are 12.

Substitute 0

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