东河泥石流对高速公路危险性评价及防治

Risk assessment and prevention of east river debris flow to expressway bridges

为了评价西昌市东河泥石流对某高速公路的影响,采用遥感解译、野外调查、室内分析与计算等手段,研究了该泥石流沟活动历史和物源特征,计算了泥石流整体冲击力、最大冲起高度、爬高及弯道超高等活动特征值,预测了该泥石流的爆发频率。基于此,对高速公路桥梁危险性进行了评价,提出了泥石流沟区域高速公路路线布设、桥梁净空、结构形式及桥墩防撞等综合防治措施,可供类似地区高速公路工程参考。

To evaluate the impact of the East River debris flow on a highway bridge in Xichang City.Remote sensing interpretation,field survey,indoor analysis and calculation were used to study the activity history and provenance characteristics of the debris flow gully,and the overall impact force of the debris flow,the maximum rise height,the climbing height,and the curve superelevation were calculated.The eruption frequency of the debris flow was also predicted.Based on this,the risk of expressway bridges was evaluated,and comprehensive prevention and control measures such as route layout,bridge clearance,structural form and bridge pier collision prevention in the debris flow ditch area were proposed,which can be used as a reference for expressway projects in similar areas.