陕西省连阴雨诱发公路崩塌类灾害区域危险性评价  

Regional risk evaluation of highway collapse induced by continuous rain in Shaanxi Province

作　　者：齐洪亮[1] 田伟平[1] 李家春[1] 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2016年第3期7-12,共6页Journal of Chang’an University(Natural Science Edition)

基　　金：交通运输部西部交通建设科技项目(2006 318 000 07);中央高校基本科研业务费专项资金项目(310821161014);中交股份科技研发项目(2011-ZJKJ-094)

摘　　要：针对连阴雨诱发公路崩塌类灾害区域危险性评价,基于区域影响因素叠加理论,建立了连阴雨诱发公路崩塌类灾害区域危险性评价模型。从诱发因素、地形地貌因素、地质因素和其他因素4个方面,选择区域年平均连阴雨次数、区域地形坡度、区域地表破碎程度、区域岩土体性质和区域植被特征作为特征指标,建立了连阴雨诱发公路崩塌类灾害区域危险性评价指标。利用GIS(地理信息系统)完成了陕西省连阴雨诱发公路崩塌类灾害区域危险性评价,并将陕西省连阴雨诱发公路崩塌类灾害区域危险性分为5个等级。针对陕西省境内的国道和省道,完成了陕西省连阴雨诱发干线公路崩塌类灾害区域危险性评价,给出了陕西省连阴雨诱发公路崩塌类灾害区域危险性特征分布。研究结果表明:G210、G108、G316、S310、S207、S308、S309、S210等部分路段的危险度指数为极严重危险,应引起相关部门的重视。Aiming at the regional risk evaluation of highway collapse induced by continuous rain,regional risk evaluation models were established based on the superposition theory of regional impact factors.From four main factors such as inducing conditions,topography,geology and other factors,annual average times of continuous rain,terrain slope,density of surface cutting,soil types and vegetation coverage were selected as evaluation indicators.Regional risk evaluation of highway collapse induced by continuous rain in Shaanxi Province was finished by GIS,and the risks were divided into five grades according to disaster characteristics in Shaanxi Province.Finally,regional risk distribution of trunk-highway collapse induced by continuous rain in Shaanxi Province was revealed based on the evaluation.The results show that risk grade ofportions of G210,G108,G316,S310,S207,S308,S309 and S210are extremely severe,which should attract the attention of the related departments.4tabs,2figs,20 refs.

关 键 词：道路工程 连阴雨 崩塌 危险评价 GIS 

分 类 号：U411[交通运输工程—道路与铁道工程]