A saturated clay layer of 5m thickness takes 1.5 year for 50% primary consolidation when drained on both sides. Its co-efficient of volume change, m, is 1.5 x 10-3 m2/kN. Determine coefficient of consolidation (in m2/yr) and the coefficient of permeability (in m/yr). Assume Yw = 10 kN/m3. %3D

A saturated clay layer of 5m thickness takes 1.5 year for 50% primary consolidation when drained on both sides. Its co-efficient of volume change, m, is 1.5 x 10-3 m2/kN. Determine coefficient of consolidation (in m2/yr) and the coefficient of permeability (in m/yr). Assume Yw = 10 kN/m3. %3D

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 9.17P

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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.

Question

A saturated clay layer of 5m thickness takes
1.5 year for 50% primary consolidation when
drained on both sides. Its co-efficient of volume
change, m, is 1.5 x 10-3 m2/kN. Determine
coefficient of consolidation (in m2/yr) and the
coefficient of permeability (in m/yr). Assume
Yw = 10 kN/m3

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