A 10 m deep layer of clay has a void ratio of 0.56 and is loaded with an effective normal stress equal to 150 kPa. On imposing an additional stress of 200 kPa, the observed value of total consolidation was 0.5 m. Determine the coefficient of consolidation.

A 10 m deep layer of clay has a void ratio of 0.56 and is loaded with an effective normal stress equal to 150 kPa. On imposing an additional stress of 200 kPa, the observed value of total consolidation was 0.5 m. Determine the coefficient of consolidation.

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 9.2P

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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 10 m deep layer of clay has a void ratio of 0.56 and is
loaded with an effective normal stress equal to 150 kPa. On
imposing an additional stress of 200 kPa, the observed value
of total consolidation was 0.5 m. Determine the coefficient of
consolidation.

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