川藏公路G317线H3滑坡稳定性分析

Stability Analysis on H3 Landslide at Sichuan-Tibet Highway G317

川藏公路G317线K1553+776～K1553+957处滑坡位于雍达曲左岸岸坡上。勘察了解了滑坡形成的过程,查明了滑坡的分布范围、滑坡所处的地质条件以及滑动面的位置,对该滑坡稳定性做了定性定量分析,认为该滑坡在持续降雨和地震的共同作用下容易产生次生滑坡,而且滑坡治理难度大,建议线路宜展线至对岸较稳定一侧。

Landslide occurred between Stations Kl153＋776 and Kl153 ＋957 of Sichuan-Tibet Highway G317. It is at the left bank of Yongdaqu River. The subsurface investigation revealed the landslide limits and the subsurface conditions. Based on the analysis, it is concluded that the landslide was triggered by the seismic and the rainfall actions. The secondary slides are also prone to occur after the primary slides. These slides are very difficult to mitigate. The highway is recommended to relocate to the opposite side of the river which has relatively more stable condition.