Three consolidated-undrained tri-axial tests were performed on samples retrieved from a 4 meter thick layer of saturated clay layer (ysat=20.7 kN/cubic meter. The top of the clay and the water level are at the ground surface. Results of these three tests are summarized in the following table: Test Chamber Pressure, o3 Deviator Stress, Aod Pore Pressure@Failure (kN/sq m) 80 (kN/sq m) 170 AU, (kN/sq m) -12 1) 2) 3) a. Determine graphically the Mohr-Coulomb effective shear strength parameters c' (in kN/sq m) and o' 155 300 -55 255 415 -85

Three consolidated-undrained tri-axial tests were performed on samples retrieved from a 4 meter thick layer of saturated clay layer (ysat=20.7 kN/cubic meter. The top of the clay and the water level are at the ground surface. Results of these three tests are summarized in the following table: Test Chamber Pressure, o3 Deviator Stress, Aod Pore Pressure@Failure (kN/sq m) 80 (kN/sq m) 170 AU, (kN/sq m) -12 1) 2) 3) a. Determine graphically the Mohr-Coulomb effective shear strength parameters c' (in kN/sq m) and o' 155 300 -55 255 415 -85

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

Three consolidated-undrained tri-axial tests were performed on samples
retrieved from a 4 meter thick layer of saturated clay layer (ysat=20.7
kN/cubic meter. The top of the clay and the water level are at the ground
surface. Results of these three tests are summarized in the following table:
Test Chamber Pressure, o3 Deviator Stress, Aod Pore Pressure@Failure
AU, (kN/sq m)
-12
(kN/sq m)
(kN/sq m)
1)
2)
3)
a. Determine graphically the Mohr-Coulomb effective shear
strength parameters c' (in kN/sq m) and o’
80
170
-55
-85
155
300
255
415

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The value of x is 8
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