The soil below a concrete dam has a porosity of 0.4 and density of solids of 2.7 gm/cm'. To ensure safety against piping, the specifications state that the exit gradient must not exceed 30% of the critical gradient at which piping will occur. What is the allowable exit gradient?

The soil below a concrete dam has a porosity of 0.4 and density of solids of 2.7 gm/cm'. To ensure safety against piping, the specifications state that the exit gradient must not exceed 30% of the critical gradient at which piping will occur. What is the allowable exit gradient?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter7: Seepage

Section: Chapter Questions

Problem 7.6P

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The soil below a conerete dam has a porosity of 0.4 and density of solids of 2.7 gm/em.
To ensure safety against piping, the specifications state that the exit gradient must not
exceed 30% of the critical gradient at which piping will occur. What is the allowable exit
gradient?

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