论文部分内容阅读
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 assessment of the danger of road-disasters-induced disasters in rainy areas, a risk assessment model of the disastrous areas of road-disasters caused by rain-rain is established based on the theory of superposition of factors in the area. From four aspects of inducing factors, topographic and geomorphological factors, geological factors and other factors, the annual average number of rainy days, regional topographic gradient, the degree of surface crustal disintegration, regional rock and soil properties and regional vegetation characteristics were selected as the characteristic indexes. Highway collapse disaster hazard assessment index. The GIS (Geographic Information System) was used to evaluate the danger of road-disasters caused by continuous rainfall-induced rain in Shaanxi Province. The risk of road-disastrous disasters caused by continuous rainfall in Shaanxi Province was divided into five levels. In the light of the national and provincial highways in Shaanxi Province, the assessment of the danger of road disasters caused by the rainy days in Shaanxi Province is completed, and the distribution of dangerous characteristics of the road disasters caused by continuous rain in Shaanxi Province is given. The results show that the risk index of some sections such as G210, G108, G316, S310, S207, S308, S309, S210 and so on are very serious and should be paid more attention by relevant departments.