Chapter 9, Problem 9.6P

Principles of Geotechnical Enginee...

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

Chapter
Section

Principles of Geotechnical Enginee...

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

For a sandy soil with Gs = 2.68, calculate the critical hydraulic gradient that will cause boiling or quick condition for e = 0.38, 0.48, 0.6, 0.7, and 0.8. Plot the variation of icr with the void ratio.

To determine

Find the hydraulic gradient icr that will cause boiling or quick condition and also plot the variation of hydraulic gradient with the void ratio (e).

Explanation

Given information:

The specific gravity Gs of the sandy soil is 2.68.

Calculation:

Determine the hydraulic gradient icr that will cause boiling or quick condition when the void ratio is 0.38 using the formula.

icr=Gs11+e

Substitute 2.68 for Gs and 0.38 for e.

icr=2.6811+0

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