層すべり挙動解析への室内せん断試験の適用

概要

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It has been often reported that the shear strength parameters obtained in laboratory test on the undisturbed soils sampled from landslides have disagreed with the back calculated ones. Therefore, authors investigated the practical application of direct shear test to analyze the landslide movement of bedding plane slide with reference to the plane strain behavior of modified Cam-Clay model, and some important conclusions were obtained. For example, (1) The stress state on the horizontal plane in direct shear test reached the critical condition at peak of stress-strain curve or gradually approached it with strain. (2) Therefore, the friction angle at Mohr-Coulomb rupture could be theoretically predicted from the results of direct shear test in modified Cam-Clay theory. (3) The value of friction angle predicted above almost agreed with the back calculated ones for the normally consolidated and lightly overconsolidated soils.
東海大学の論文