A deep na slopes 15 kN/m2, p = 15°, e = 0.76 and G = 2.7. Taylor's stability number for that sudden drawdown = 0.136. The factor of safety with respect to cohesion in the case of sudden drawdown will be

A deep na slopes 15 kN/m2, p = 15°, e = 0.76 and G = 2.7. Taylor's stability number for that sudden drawdown = 0.136. The factor of safety with respect to cohesion in the case of sudden drawdown will be

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter15: Braced Cuts

Section: Chapter Questions

Problem 15.5P

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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

Slope stability.

A canal of 4 m deep has side slopes of 1:1. The properties of the soil are c =
15 kN/m², p = 15°, e = 0.76 and G = 2.7. Taylor's stability number for that
sudden drawdown = 0.136. The factor of safety with respect to cohesion in the
case of sudden drawdown will be

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