基于GIS的边坡三维稳定性计算  

Three-dimensional slope stability analysis based on GIS

作　　者：杨伟[1] 丁伯阳[1] 潘晓东[1] 朱益军 陶海冰[3] 

机构地区：[1]浙江工业大学岩土工程研究所,浙江杭州310032 [2]浙江省交通规划设计研究院,浙江杭州310014 [3]杭州师范大学理学院,浙江杭州310036

出　　处：《浙江工业大学学报》2012年第1期92-95,共4页Journal of Zhejiang University of Technology

基　　金：浙江省科技厅基金资助项目(2009C33047)

摘　　要：根据高速公路高边坡的钻孔资料,利用ArcMap建立进行三维边坡稳定性分析的TIN数据层和栅格数据层,将栅格数据模型的各层对应栅格块视为一个滑坡单元体,通过读取相应栅格值进行稳定性计算.针对顺层滑坡的特点,采用ArcGIS集成的VBA开发环境,提出了一种三维折线法分析边坡的稳定性.该方法通过对栅格数据的重采样,可以计算任意滑动方向三维边坡的安全系数,通过选择最小安全系数来确定边坡的主滑动方向.结合某高速公路大型岩质滑坡的工程实例,通过比较三维折线法计算结果与某典型剖面的二维不平衡推力法计算结果,讨论该方法对工程滑坡治理的指导意义.According to the borehole date of Highway,the TIN data layer and grid data layer for three-dimensional slope stability analysis were carried out by use of ArcMap.The value of each gird cell of different layers are picked up as slide block,it makes convenience in the slope stability analysis.Considering the property of bedding landslide,the three-dimensional slope stability analysis program based on VBA of ArcGIS is put forward in this paper.The program can calculate the Stability factor of any directions by resampling of raster date,thus the real sliding direction can be determined by the minimum value of the Stability factor.Taking one of the large rocky landslide as an example,the results of the three-dimensional with the two-dimensional method of a typical profile of the slope are compared.

关 键 词：三维边坡 边坡稳定 GIS 滑动方向 折线法 

分 类 号：TU457[建筑科学—岩土工程]