A STUDY OF DEEP-SEATED LANDSLIDE AND ITS DEFORMATION BEHAVIOR DUE TO ROCK BRIDGE BY CENTRIFUGE MODEL TEST

Rock slope, which have not clearly slide before, sometimes bring about deep-seated landslide owing to external force (e.g. heavy rain fall). In the inner part of such a rock slope, the rock bridges are certainly confirmed on the actual cases of a deep-seated landslide. In this study, two cases of centrifuge model tests assuming two actual landslides were conducted to evaluate deformation mechanisms of a deep-seated landslide. The deformation behaviors due to monotonous centrifugal loading demonstrated that local deformations are concentrated around inner rock bridge, and different deformation behaviors are clearly obtained due to the location of rock bridge. Swelling behaviors on the middle of slopes are locally observed in both two cases.