A clay specimen drained on both sides was tested. The data were obtained P1=50 kPa e1=0.92 P2=120 kPa e2=0.78 Time for 50% consolidation=2.5 min Tv=0.197 Determine the following 1. Coefficient of compressibility (Ans. 1.08x10-3 m2/kN)

A clay specimen drained on both sides was tested. The data were obtained P1=50 kPa e1=0.92 P2=120 kPa e2=0.78 Time for 50% consolidation=2.5 min Tv=0.197 Determine the following 1. Coefficient of compressibility (Ans. 1.08x10-3 m2/kN)

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter12: Shear Strength Of Soil

Section: Chapter Questions

Problem 12.18P

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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 clay specimen drained on both sides was tested. The data were obtained

P₁=50 kPa

e₁=0.92

P₂=120 kPa

e₂=0.78

Time for 50% consolidation=2.5 min

T_v=0.197

Determine the following

1. Coefficient of compressibility (Ans. 1.08x10^-3 m²/kN)

2. Coefficient of consolidation (Ans. 1.23x10^-5 m²/min)

3. Hydraulic conductivity of clay for the loading range (Ans. 1.31 x10^-7 m/min)

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