基于边坡单元的公路沿线滑坡危险度概率分析.pdf

DOI:10.16285/j.rsm.2005.11.008 26 11 Vol.26 No.11 2005 11 Rock and Soil Mechanics Nov. 2005 2005) ( 812-8581) slope unit GIS 1.0 49 TU 457 A Slope unit based probabilistic analysis of slope stability along highway routes in Japan QIU Cheng, WANG Chun-xiang, ESAKI Tetsuro, XIE Mo-wen (Institute of Environmental Systems, Kyushu University, Hakozaki 6-10-1, Higashi Ku, Fukuoka, 812-8581, Japan ) Abstract: Landslides, that occurred on steep slopes along highway routes, always cause traffic stagnation, even endanger property and human life. For doing maintenance work effectively and avoiding disasterit is essential to assess stability of road slopes. In this study, the large research area is firstly divided into slope units, which are used as the objectives of the three-dimensional deterministic model. Then a random searching method is used to locate the critical slip surface of each slope unit. The critical slip surface with the minimum safety factor is calculated by a GIS-based 3D slope stability model. The failure probability of each slope unit is calculated and landslide hazard degree of the studied area is zoned quantitatively. The methodology is illustrated by a probabilistic slope analysis of the 49th national road in Gouto area of Japa