Geographic information systems-based three-dimensional critical slope stability analysis and landslide hazard assessment
Geographic information systems-based three-dimensional critical slope stability analysis and landslide hazard assessment
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基于地理信息系统的三维临界边坡稳定性分析与滑坡灾害评价
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Y. Mitani
中科院分区：
文献类型：
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作者：
M. Xie;T. Esaki;Guoyun Zhou;Y. Mitani
本文将地理信息系统（GIS）空间分析功能和水文分析建模工具与基于柱的三维（3D）边坡稳定性分析模型相结合，建立了一种新的基于GIS网格的边坡稳定性分析三维确定性模型。假设初始滑移为椭球体的下半部分，采用蒙特卡罗随机模拟方法，通过最小化三维安全系数的方法来识别三维边坡稳定性分析中的三维临界滑移面。利用该水文分析建模工具，将整个研究区划分为若干个边坡单元，并以每个边坡单元为研究对象，求得每个边坡单元的最小三维安全系数，进而绘制整个研究区的滑坡危险性图。
In this paper, by combining the geographic information systems (GIS) spatial analysis function and a hydrologic analysis and modeling tool with a column-based three-dimensional (3D) slope stability analysis model, a new GIS grid-based 3D deterministic model has been developed for slope stability analysis. Assuming the initial slip as the lower half of an ellipsoid, the identification of the 3D critical slip surface in the 3D slope stability analysis is performed by means of a minimization of the 3D safety factor using Monte Carlo random simulation. By using this hydrologic analysis and modeling tool, dividing the whole study area into slope units, and taking each slope unit as a study object, the minimum 3D safety factor for each slope unit can be obtained, and the landslide hazard can then be mapped for the whole study area.