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IN-SITU DETERMINATION OF DISINTEGRATION ENERGY FOR SOFT SENSITIVE CLAYS
Session: Problematic Soils and Ground Improvement II / Sols problématiques et amélioration du comportement II
Vikas Thakur, Norwegian University of Science and Technology (Norway)
Anders Gylland, Norwegian University of Science and Technology (Norway)
Samson Degago, Norwegian Public Roads Administration (Norway)
Frode Oset, Norwegian Public Roads Administration (Norway)
Rolf Sandven, Multiconsult As (Norway)
An accurate assessment and prediction of retrogressive landslides in sensitive clays is a complex and demanding task. Still, there have been several attempts to assess flow slide potentials by looking at certain aspects of sensitive clays of which one of them is studying the energy involved in the disintegration of sensitive clays from an intact to a remolded state. This energy is referred to as disintegration energy. Estimation of disintegration energy in the laboratory is not a straightforward task. Moreover, the challenges associated with the sampling of soft sensitive clays complicate the overall picture. Therefore, in this study an effort was made to perform an in-situ measurement of the disintegration process of Norwegian sensitive clays using the electric vane shear apparatus. The significance of the testing procedure and the results are discussed in light of available analytical and laboratory test results. This is also evaluated in light of previous work reported in the literature.
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