陕西省干线公路雪灾风险评价  

Assessment of Snow Disaster Risk of Trunk Highway in Shaanxi Province

作　　者：尹超[1] 梁晓飞[1] YIN Chao;LIANG Xiao-fei(School of Civil and Architecture Engineering,Shandong University of Technology,Zibo Shandong 255049,China)

机构地区：[1]山东理工大学建筑工程学院,山东淄博255049

出　　处：《公路交通科技》2018年第9期27-33,共7页Journal of Highway and Transportation Research and Development

基　　金：山东省自然科学基金项目(2015ZRB019JS);山东理工大学博士科研启动基金项目(415046)

摘　　要：针对陕西省干线公路雪灾频发的现实,基于风险理论开展了陕西省干线公路雪灾危险性、承灾体易损性和风险评价。选取年平均积雪深度≥1 cm日数为空间危险性评价指标,从空间和时间维度进行了陕西省干线公路雪灾危险性评价。选取区域路网密度为承灾体易损性评价指标进行了承灾体易损性评价。通过引入风险度指数建立了风险评价模型,完成了陕西省干线公路雪灾风险评价,明确了陕西省干线公路雪灾风险等级。研究结果显示:陕西省干线公路雪灾风险度指数的区域分异特征十分明显,榆林北部、渭南东部及汉中大部分地区风险较低,延安、安康及商洛大部分地区次之,秦岭山区及咸阳西北部地区最高;陕西省干线公路雪灾风险分为低风险、中等风险、较高风险、高风险和极高风险5级,高风险和极高风险区主要集中于秦岭山区和咸阳西北部地区,分别占陕西省总面积的10.74%和9.42%,计算结果与陕西省已发干线公路雪灾状况一致;G108,G210,G211,G310,G312和S101,S107,S209,S304,S306等干线公路均有部分路段位于高风险区或极高风险区内,这些路段应加强日常养护、物资和装备储备以及编制灾害应急预案,一旦发生灾害,应保证抢险救灾人员和物资装备迅速到达灾害现场开展工作,以降低灾害风险,减轻灾害损失。The hazard assessment,disaster-affected body＇s vulnerability assessment and risk assessment of snow disasters along trunk highways in Shaanxi Province are accomplished based on the risk theory in view of its high frequency. Selecting the average annual number of days that snow depth is not smaller than 1 cm as the spatial hazard assessment index,the hazard assessment for snow disasters along the trunk highways in Shaanxi Province is performed both from time and spatial dimensions. Selecting the density of regional highway network as the disaster-affected body＇s vulnerability index,the disaster-affected body＇s vulnerability assessment is conducted. The risk index is introduced to establish the risk assessment model,the risk assessment of snow disasters along trunk highways in Shaanxi province is conducted,and the risk level of snow disaster in Shaanxi Province is cleared. The research result shows that（ 1） the risk indexes of snow disasters along highways in Shaanxi province are of great regional differentiation characteristics,north Yulin,east Weinan and most of Hanzhong are comparably low, Yanan, Ankang and most of Shangluo are comparably higher,the Qinling Mountains and northwest Xianyang are the highest;（ 2） the snow disasters in Shaanxi Province is divided into 5 risk levels,namely low risk,middle risk,comparably high risk,high risk and very high risk,the high risk regions and very high risk regions are Qinling mountain area and northwestarea of Xianyang,which accounts for 10. 74% and 9. 42% of the total area of Shaanxi Province respectively,the calculation results are in accordance with the actual condition of snow disasters along trunk highways in Shaanxi Province;（ 3） some sections of G108,G210,G211,G310,G312 and S101,S107,S209,S304,S306 are located in high risk region and very high risk region,we should strengthen their daily maintenance,equipment storage and disaster emergency plan formulation,and should guarantee the rescue workers and equipments reach the disaster scenes as soon as qu

关 键 词：道路工程 风险评价 空间分析 干线公路 雪灾 

分 类 号：U419.92[交通运输工程—道路与铁道工程]