川藏公路北线泥石流特征及其防治措施研究  

Study on characteristics and prevention measures of debris flows along northern line of Sichuan-Tibet Highway

作　　者：韩方 陈兴长[1] 孙聿卿 唐勤 HAN Fang;CHEN Xingzhang;SUN Yuqing;TANG Qin(School of Environment and Resource,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学环境与资源学院,四川绵阳621010

出　　处：《人民长江》2022年第7期20-26,共7页Yangtze River

基　　金：第二次青藏高原综合科学考察研究项目(2019QZKK0902)。

摘　　要：川藏公路北线沿线泥石流灾害数量多、分布广,活动频繁,严重影响到了公路正常运行。在资料收集、遥感解译和开展野外调查的基础上,系统地研究了川藏公路北线四川省新都桥镇-西藏自治区昌都市段泥石流的发育状况和危害特征,并研究制定了相应的防治措施和建议。研究结果表明:(1)川藏公路北线沿线共发育有各类泥石流沟339条,以暴雨型-稀性-中低频泥石流为主;(2)泥石流流域多呈长条形,面积普遍较小,沟道短,纵坡降大;(3)泥石流的危害对象主要是桥涵和路基路面,危害方式以冲刷、磨蚀和淤埋为主。基于研究结果,建议根据不同路段泥石流的流体性质、活动频率以及危害方式等,采取具有针对性的防治措施,以保障公路能够安全运营。The widely distributed debris flows along the northern line of the Sichuan-Tibet Highway are numerous and active, which seriously affect the normal operation of the highway.On the basis of data collection, remote sensing interpretation, and field investigation, we systematically studied the development status and hazard characteristics of debris flows along the northern line of the Sichuan-Tibet Highway that is from Xinduqiao Town, Sichuan Province to Changdu City, Tibet, consequently giving the corresponding control measures and recommendations.The research results show that:(1) there are 339 debris flows of various types along the northern line of the Sichuan-Tibet Highway, most are rainfall, diluted and middle, low-frequency type;(2) the debris flows basins are mostly in the shape of long strips, with a small area, short gully, and steep gradient;(3) the impacted objects are mainly bridges, culverts, and pavements by the ways of scouring, abrasion and silting.Based on the results of the study, it is recommended to take targeted prevention and control measures according to the fluid property, activity frequency, and hazard way of debris flow in different sections to ensure the highway operation safely.

关 键 词：泥石流 发育特征 危害方式 防治措施 川藏公路北线 

分 类 号：P694[天文地球—地质学]