For normal stress of 150kPa, the value of void ratio is 0.5. Determine the amount of normal stress that should be increased in orderto achieve a void ratio of 0.45 if the compression index of the soil is 0.27.

For normal stress of 150kPa, the value of void ratio is 0.5. Determine the amount of normal stress that should be increased in orderto achieve a void ratio of 0.45 if the compression index of the soil is 0.27.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter11: Compressibility Of Soil

Section: Chapter Questions

Problem 11.4P

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Concept explainers

Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.

Question

For normal stress of 150kPa, the value of void ratio is
0.5. Determine the amount of normal stress that should
be increased in orderto achieve a void ratio of 0.45 if
the compression index of the soil is 0.27.

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