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What is the active pressure coefficient for a soil with 28˚ angle of internal friction and cohesion of 20 kPa? What will be the effect if the cohesion is decreased to 5 kPa?

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.16P: For a normally consolidated soil, the following is given: Determine the following: a. The...

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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.

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What is the active pressure coefficient for a soil with 28˚ angle of internal friction and cohesion of 20 kPa? What will be the effect if the cohesion is decreased to 5 kPa?

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