On the determination of the undrained shear strength from vane shear testing in soft clays
The vane shear test is one of the most common techniques for estimating the in situ undrained shear strength of clay deposits. Despite its simple operational principle, interpretation of test results is inherently based on several assumptions regarding the interaction between the rotating blades and the deforming soil, which have not been adequately validated for soft marine clays of variable geotechnical and geochemical prop-erties. This paper provides a brief review on the background of current interpretation methods, followed by a critical discussion of their key simplifying assumptions in the light of new experimental data from undisturbed and remoulded samples.
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