隆务峡段公路泥石流危险性评价  

Risk assessment of debris flow along the highway of Longwu gorge section

作　　者：王国建 井浩 陶虎[2] WANG Guojian;JING Hao;TAO Hu(Qinghai Communication Technical College,Xining 810003,China;Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]青海交通职业技术学院,青海西宁810003 [2]兰州交通大学,甘肃兰州730070

出　　处：《青海大学学报》2022年第4期88-96,共9页Journal of Qinghai University

基　　金：青海省科学技术厅项目(2018-ZJ-733)。

摘　　要：为了解G213线策克至磨憨公路隆务峡段沿线泥石流灾害的危险程度,文中对沿线的11条典型泥石流沟进行现场调查,获取了泥石流沟形态特征参数,运用物元可拓法构建泥石流危险性评价模型。选取了10个具有代表性及相对独立的评价因子,利用层次分析法确定各因子的权值,计算各个泥石流沟的综合关联度,得出各单沟泥石流的危险等级。评价结果表明:11条典型泥石流沟中,中度危险的泥石流沟4条,占36.4%,均为沟谷型泥石流沟;低度危险的泥石流沟7条,占63.6%,均为坡面型泥石流沟。物元可拓模型在公路泥石流危险性评价精度方面,评价结果与实际情况总体吻合度达到90.9%,坡面型泥石流沟吻合度为85.7%,而沟谷型泥石流沟吻合度为100%.本研究结果可为该区域泥石流危险性评价提供借鉴。There are 11 typical debris flow gullies along the Longwu gorge section of G213 line from Ceke to Mohan highway investigated on the spot to explore the risk degree of debris flow along the line.The morphological characteristic parameters are obtained as well.The risk evaluation model of debris flow is constructed by using matter-element extension method.There are 10 evaluation factors selected in the study which are representative and relatively independent.The weight of each factor is determined by analytic hierarchy process.The comprehensive correlation degree of each debris flow gully is calculated to get their risk grade.The evaluation results show that there are 4 moderately dangerous debris flow gullies accounting for 36.4%,all of which are valley type;there are 7 low-risk debris flow gullies accounting for 63.6%,all of which are slope type.The evaluation results of matter-element extension model are consistent with actual situation to 90.9%,with the slope type debris flow gully to 85.7%,and with the gully type debris flow gully to 100%.The results can provide a reference for the risk assessment of debris flow in this area.

关 键 词：泥石流 隆务峡 危险性评价 物元可拓法 

分 类 号：P642.23[天文地球—工程地质学] U418.56[天文地球—地质矿产勘探]