A bed of sand consists of three horizontal layers of equal thickness. The value of k for the upper and lower layers is 1x10-4 m/s. What is the ratio of the average permeability of the bed in the horizontal direction to that in the vertical direction?

A bed of sand consists of three horizontal layers of equal thickness. The value of k for the upper and lower layers is 1x10-4 m/s. What is the ratio of the average permeability of the bed in the horizontal direction to that in the vertical direction?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter9: Consolidation

Section: Chapter Questions

Problem 9.12P

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Concept explainers

Consolidation parameters

Consolidation is the process of expulsion of pore water present in the voids of soil solids under the pressure of the applied load. This is a quick process in the case of coarse-grained soils since the permeability is high due to the presence of more voids, while it is a slow and gradual process in the case of clayey soil as the permeability of clay is less. An example of consolidation is the settlement of soil under a building due to the load coming from the building.

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