GIS-based 3D wedge stability evaluation of a high rock slope

Because of the spatial complexity of rock and soil slopes in space, the three-dimensional analysis of slope has been one of the most important research topics in the geotechnical engineering field. In recent years, the development of GIS (Geographic Information System) technology provides powerful tools for the three-dimensional spatial analysis of slopes. Taking the high slope of a hydropower station as the research object, the slope three-dimensional limit equilibrium stability analysis method has been adopted in the stability analysis of the wedge body. The process of GIS data and the three-dimensional limit equilibrium model have also been introduced in this paper. Moreover, three stages of slope stability analysis based GIS, geological data processing, modeling and model application, are presented in detail. Throughout the method mentioned above, the safety factor of the slope is 0.919, and the safety factor is 1.212 in the case of the designed anchor supporting. The results show not only the safety factor of slope, but also the distribution of the slip force on the crucial slip surface. It may provide explicit data support for the slope reinforcement design, three-dimensional simulation and optimization.