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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

For a sand, the porosity n = 0.28 and k = 0.058 cm/sec. Determine k when n = 0.45. Use Eq. (7.31).

To determine

Find the hydraulic conductivity of the sand at porosity of 0.45.

Explanation

Given information:

The hydraulic conductivity (k1) of the sand at porosity value (n1) of 0.28 is 0.058 cm/sec.

The second porosity value (n2) is 0.45.

Calculation:

Determine the void ratio (e1) using the relation.

e1=n11n1

Substitute 0.28 for n1.

e1=0.2810.28=0.388

Determine the void ratio (e2) using the relation.

e2=n21n2

Substitute 0.45 for n2.

e2=0.4510.45=0

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