Development of GIS-based spatial three-dimensional slope stability analysis system: 3DSlopeGIS

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Based on a new IT technology-Geographic Information System (GIS), this paper presents a new slope analysis approach which can be used to identify the possible slope failure bodies from complicated topography. In a system, all slope-related spatial information (vector or raster dataset) are integrated; the study area is divided into Slope Unit which possesses approximate inclination; assuming the initial slip to be the lower part of an ellipsoid, the 3-D critical slip surface in the 3-D slope stability analysis is located by minimizing the 3-D safety factor using the Monte Carlo random simulation.<BR>The system 3DSlopeGIS has been validated based on the results of three cases study. Based on numerous times Monte Carlo simulation (30 millions per 1kre2 range), the possible slope failure bodies have been identified which is impossible by using transitional slope stability analyses.

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