摘要
以川藏交通走廊冻融侵蚀灾害为研究对象,采用冻融指数比和月平均气温为指标建立了该走廊冻融侵蚀风险评价方法和体系,得到以下结论:川藏交通走廊(西藏境)需要进行工程措施处理的一级冻融侵蚀区段长度为221.3km,需要进行冻融侵蚀引发地质灾害监测的二级冻融侵蚀区段长度为521.7km;水分和海拔双重控制冻融侵蚀强度,冰川作用强烈区域同时也是冻融侵蚀强烈的地区。
Taking freeze-thaw erosion in Sichuan-Tibet Transportation Corridor(STTC)as research object,the risk assessment method and system of freeze-thaw erosion in the STTC are established by using freeze-thaw index ratio and monthly mean temperature as indicators.The results are as follows:the firstorder freeze-thaw erosion zone needs to be treated by engineering measures,and its length in the STTC(in Tibet)is 221.3 km.The second-order freeze-thaw erosion zone length is 521.7 km,which needs to be constantly monitored as geological hazards would be induced by freeze-thaw erosion in this zone.Freezethaw erosion intensity is controlled by both moisture and elevation.The area with strong glaciation is also the one with strong freeze-thaw erosion.
作者
彭惠
穆柯
董元宏
PENG Hui;MU Ke;DONG Yuan-hong(State Key Laboratory of Road Engineering Safety and Health in Cold and High-Altitude Regions,CCCC First Highway Consultants Co.Ltd.,Xi'an 710065,China)
出处
《公路》
北大核心
2019年第10期157-161,共5页
Highway
基金
陕西省创新能力支撑计划-青年科技新星项目，项目编号2017KJXX-25,2018KJXX-057,2019KJXX-079
关键词
川藏交通走廊
冻融侵蚀
季节冻土
融冻指数比
风险评估
Sichuan-Tibet Transportation Corridor(STTC)
freeze-thaw erosion
seasonal frozen soil
freeze-thaw index ratio
risk assessment
