基于GIS的三维边坡稳定性分析和危险滑面搜索  

Research on Three-dimensional Analysis of Slope Stability and Automatical Search for the Critical Failure Surface Based on GIS

作　　者：孙世国 王超 宋维琦 SUN Shiguo;WANG Chao;SONG Weiqi(College of Civil Engineering, North China University of Technology, Beijing 100144, China)

机构地区：[1]北方工业大学土木工程学院,北京100144

出　　处：《矿业研究与开发》2018年第4期46-50,共5页Mining Research and Development

基　　金：国家自然科学基金项目(41772335);国家重点研发计划课题项目(2016YFC0701810);科技创新能力建设项目(PXM2017-014212-000015);中冶交通建设集团科技项目(2017-SZ1);国家"十二五"科技支撑项目(2012BAK09B06)

摘　　要：针对GIS不能直接对边坡进行稳定性计算和三维滑动面自动搜索的问题,结合某露天煤矿采区边坡工程资料,选取采区边坡稳定性的10种影响因素,运用改进的层次分析理论计算各影响因子综合权重,经ArcGIS加权叠加分析工具对整个采区进行危险区划,并划分为5个等级。基于评价结果提取出危险区域局部地形,基于改进的剩余推力计算方法以及临界滑动面搜索技术,创建Python开发环境下的GIS脚本工具,自动搜索边坡的三维极限状态滑动面并计算其安全系数,并基于ArcScene生成该滑动面的三维地形,计算结果表明,该方法具有重要的研究意义。The GIS cannot directly calculate the slope stability and automatically search the three-dimensional failure surface. Ac- cording to the problem, combined with slope engineering data of mining area in an open-pit coal mine, ten influencing factors which affected the slope stahility were selected to calculate each compreherfsive weight by improved AHP. Then the entire min- ing area was classified into 5 hazardous levels with the weighted overlay tool of ArcG1S. According to the evaluation result, the typical terrain of the hazardous area was extracted. Based on the improved residual thrust method and the searching technology of critical failure surface, a GIS scripting tool was created in a Python development environment, so as to search critical failure surface automatically and calculate its safety factors. Afterward, the three-dimensional terrain of the sliding surface for this slope was drawn by AreScene. The calculated results showed this method was of great research significance.

关 键 词：边坡稳定性 危险区划 滑动面 GIS 

分 类 号：TU457[建筑科学—岩土工程] P208[建筑科学—土工工程]