线路工程地震触发高位崩塌滑坡灾势预测方法  

Potential disaster prediction of seismic high-locality landslide on line project

作　　者：郭海强[1] 姚令侃[1,2,3] 孙少伟[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]高速铁路线路工程教育部重点实验室(西南交通大学),成都610031 [3]抗震工程技术四川省重点实验室(西南交通大学),成都610031

出　　处：《哈尔滨工业大学学报》2017年第3期155-161,共7页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金面上项目(41172321);国家自然科学基金重点项目(41030742);中国铁路总公司科技研究开发计划(20014G004-A-6)

摘　　要：为了能够在高烈度山区快速判识威胁到线路工程的地震触发高位崩塌滑坡,提出一种地震触发高位崩塌滑坡灾势预测方法.预测方法在GIS技术支持下,按照水文地质条件划分边坡单元;基于边坡单元建立威胁线路的高位边坡判识模型,即高位边坡须同时满足能量和路径两种必要条件,才能保证其在失稳后会威胁到线路工程;在此基础上,结合综合指标法预测地震触发的崩塌滑坡,得到了研究区域内地震作用下威胁到线路工程的高位崩塌滑坡灾势区划图.案例分析结果表明:灾势预测方法可以对来自于路域以外复杂坡体条件下的地震触发高位崩塌滑坡体是否会威胁到线路工程进行快速判识,对高烈度山区线路选线以及既有线改建工程提供决策依据,可用于指导选线设计人员快速完成空间概略定线及多目标决策.To quickly identify whether seismic high-locality landslides could threaten the line project at highintensity mountains,potential disaster prediction of seismic high-locality landslide is proposed. According to hydrogeology condition,slope units are divided by GIS technology. Discriminant model of seismic high-locality slopes threatening line project is established. The model contains energy and path conditions. Both of two conditions are met,it can be ensured that seismic high-locality slope threatening the line project after losing stabilities. Zoning map of the seismic high-locality slopes threatening line project in study area can be obtained. Case analysis results indicate that this model approach can identify quickly which seismic high-locality landslides could threaten the line project under complex slope conditions,and provide a decision basis for location design and reconstruction of existing lines project at high-intensity mountains,and can also be used to guide designers to complete sketchy space alignment and multi-objective decision quickly in mountain.

关 键 词：地震 高位滑坡 危险度区划 选线设计 GIS 

分 类 号：TU47[建筑科学—结构工程]