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GENERAL DESCRIPTION
This test enables the direct
measurement of the undrained shear resistance of saturated cohesive soils. It
can be carried out either in the field, on the wall or at the bottom of an
excavation, or even in a laboratory on a confined specimen. The test consists
of forcing into the soil a vane equipped with four orthogonal blades and then
rotating until the soil failure. Maximum torque value must be measured and
recorded. Afterwards the remoulding shear resistance of the soil can be
measured rotating the vane for several turns. Over the blades of the vane, a
thin enlarging ring can be applied so that the main part of the resistance
due to the soil friction along the tract of the rod inserted into the soil
does not affect the measures.
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