A field vane test was performed in a soft, sensitive clay layer. The vane tester's diameter and height are 4 and 8 in., respectively. The torque required to shear the clay was 61 ft-lb. Determine the clayey soil's cohe-sion if its plasticity index is known to be 40%.

A field vane test was performed in a soft, sensitive clay layer. The vane tester's diameter and height are 4 and 8 in., respectively. The torque required to shear the clay was 61 ft-lb. Determine the clayey soil's cohe-sion if its plasticity index is known to be 40%.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Natural Soil Deposits And Subsoil Exploration

Section: Chapter Questions

Problem 3.17P

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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

A field vane test was performed in a soft, sensitive clay layer. The vane tester's diameter and
height are 4 and 8 in., respectively. The torque required to shear the clay was 61 ft-lb. Determine
the clayey soil's cohe-sion if its plasticity index is known to be 40%.

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