2008 Volume 52 Pages 565-570
It is almost impossible to know the process of a landslide occurrence by an investigation in landslide scar after the landslide had occurred. Therefore, it has been usually assumed that only one collapse occurred to become the final shape of the landslide scar. However, some of the recent landslides indicated that multiple soil masses collapsed one by one. It is not understood at all what kind of factor affects the multi-phased landslide occurrence, because it has never been studied. In this study, the effect of soil physical properties i. e., hydraulic properties and soil strength, on the process of the landslide occurrence including the multi-phased landslide are investigated by experimental and modeling approach. According to the results of these investigations, it is reveled that the soil layer with high internal friction angle and low cohesion tend to causes a small landslide and it might be followed multi-phased landslides.
