Two identical soil specimen were tested in atriaxial apparatus. First specimen failed at adeviator stress of 770 kN/m2 when the cellpressure was 200 kN/m2. Second specimenfailed at a deviator stress of 1370 kN/m² undera cell pressure of 400kN/m2. Determine thevalue of 'C' and 'O' analytically. If the same soilis tested in a direct shear apparatus with anormal stress of 600 kN/ m², estimate theshear stress at failure.

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Two identical soil specimen were tested in a triaxial apparatus. First specimen failed at a deviator stress of 770 kN/m2 when the cell

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 12.8P

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Concept explainers

Test for Determination of Shear Strength

The term shear strength is often associated with the soil. Shear strength is defined as the resistance to the deformation of soil particles due to the continuous action of shear stress. In short, shear strength is the maximum shear stress that a soil can sustain.

Question

Two identical soil specimen were tested in a
triaxial apparatus. First specimen failed at a
deviator stress of 770 kN/m2 when the cell
pressure was 200 kN/m2. Second specimen
failed at a deviator stress of 1370 kN/m² under
a cell pressure of 400kN/m2. Determine the
value of 'C' and 'O' analytically. If the same soil
is tested in a direct shear apparatus with a
normal stress of 600 kN/ m², estimate the
shear stress at failure.

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