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Principles of Geotechnical Enginee...

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

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BuyFindarrow_forward

Principles of Geotechnical Enginee...

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

Refer to Figure 8.23. Given:

  • H1 = 4 m
  • H2 = 1.5 m
  • D1 = 6 m
  • D = 3.6 m

Calculate the seepage loss in m3/day per meter length of the sheet pile (at right angles to the cross section shown). Use Figure 8.12.

images

To determine

Find the seepage loss in m3/day per meter length of the sheet pile.

Explanation

Given information:

The hydraulic conductivity of the permeable soil layer k is 4×104cm/sec.

The height of the water level H1 is 4 m.

The height of the water level H2 is 1.5 m.

The depth of permeable layer up to the end of sheet pile D is 3.6 m.

The depth of permeable layer D1 is 6 m.

Calculation:

Determine the head difference between the upstream and downstream using the relation.

H=H1H2

Substitute 4 m for H1 and 1.5 m for H2.

H=41.5=2.5m

Determine the ratio of S/T.

Here, S is the depth of penetration of the sheet pile and T is the thickness of the permeable soil layer.

Substitute 3.6 m for S and 6 m for T.

S/T=3.66=0.6

Refer Figure 8

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