Below are results from three unconsolidated undrained triaxial tests performed on a fully saturated clay specimen: Test No. 1 3 Minor principal stress (psi) Major principal stress at failure (psi) 10 25 33 22 37 45 Moisture content = 21 % Determine: a) Void ratio (e) of the soil. You may use es = wG_ (assume Gs = 2.70) b) Deviatory stress at failure for each test trial Shear strength parameters (Cu and ). Hint: Sketch the Mohr's circles for the three trials.

Below are results from three unconsolidated undrained triaxial tests performed on a fully saturated clay specimen: Test No. 1 3 Minor principal stress (psi) Major principal stress at failure (psi) 10 25 33 22 37 45 Moisture content = 21 % Determine: a) Void ratio (e) of the soil. You may use es = wG_ (assume Gs = 2.70) b) Deviatory stress at failure for each test trial Shear strength parameters (Cu and ). Hint: Sketch the Mohr's circles for the three trials.

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 12.13P

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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

Below are results from three unconsolidated undrained triaxial tests performed on a fully saturated
clay specimen:
Test No.
1
2
Minor principal stress (psi)
Major principal stress at failure (psi)
10
25
33
22
37
45
Moisture content = 21 %
Determine:
a)
Void ratio (e) of the soil. You may use eS = wG_ (assume Gs = 2.70)
%3D
b)
Deviatory stress at failure for each test trial
c)
Shear strength parameters (cu and ø). Hint: Sketch the Mohr's circles for the three
trials.
3.

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