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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 sandy soil, the following are given:

• Maximum void ratio = 0.75

• Minimum void ratio = 0.39

• Effective size, D10 = 0.32 mm

Determine the hydraulic conductivity of the sand at a relative density of 80%. Use Eq. (7.32).

To determine

Find the hydraulic conductivity of the sand at relative density of 80 %.

Explanation

Given information:

The maximum void ratio (emax) is 0.75.

The minimum void ratio (emin) is 0.39.

The effective size of the sand (D10) is 0.32 mm.

The given relative density of the sand (Dr) is 80 %.

Calculation:

Determine the void ratio (e) using the relation.

Dr=emaxeemaxemin

Substitute 80 % for Dr, 0.75 for emax, and 0.39 for emin.

80100=0.75e0.750.390.8×0.36=0

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