川藏公路通麦天险段山地灾害及其防治

本段是川藏公路有名的严重山地灾害段。近半个世纪来,十几年一遇的特大崩塌、泥石流、雪崩造成的生命、财产损失惨重,该段在雅鲁藏布江大拐弯峡谷顶端范围内,以上升为主的强烈构造活动,以大峡谷水汽通道进入水分、热量,是发生高频率高强度特大山地灾害的基础。结合当地实情,加强调查研究,划分各类灾害危险区段,提出防治措施。

MOUNTAIN HAZARD IN TANGMAI NATURAL BARRIER ALONG SICHUAN-XIZANG HIGHWAY AND ITS CONTROL

Tangmai Natural Barrier along Sichuan-Xizang Highway is a famous reach with serious mountain hazard. Since last half century, the catastrophic collapses, debris flows and snow avalanches over 10a have caused serious loss of the people's life and assets. This place is located in the range of the top and of the Big Bend Gorge of Yalungzangbo River,owing to strong tectonic activities in uplifting, and moisture and heat from the Big Bend Gorge,the catastrophic mountain hazard in the area occurred in high frequence and high strength. Therefore,in order to reduce and control the mountain hazard, it is importent to stress investigation and research, classify Various hazard type area, set up the monitoring and prediction system, as well as pay attention to prevention and control.