he following results were obtained from a direct shear test conducted on pure sand: Sample height and diameter = 30 mm and 75 mm respectively. Normal stress = 100 kN/m2 Shear force at failure = 185 N a)        Determine the angle of friction for the soil. Round off to one decimal i.e. 99.5! b)        What would be the shear force (in N) at failure if the normal stress is 175 kN/m2? Round off to the nearest figure i.e. 300.55 to 301! c)        What would be the principal stress at failure? Consider a and b

Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
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Chapter12: Shear Strength Of Soil
Section: Chapter Questions
Problem 12.9P
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he following results were obtained from a direct shear test conducted on pure sand:

Sample height and diameter = 30 mm and 75 mm respectively.

Normal stress = 100 kN/m2

Shear force at failure = 185 N

a)        Determine the angle of friction for the soil. Round off to one decimal i.e. 99.5!

b)        What would be the shear force (in N) at failure if the normal stress is 175 kN/m2Round off to the nearest figure i.e. 300.55 to 301!

c)        What would be the principal stress at failure? Consider a and b

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