丹巴县甲居滑坡复活机制及其稳定性分析

The Revival Mechanism and Stability Analysis to Jiaju Landslide of Danba County in Sichuan Province

甲居滑坡为一个特大型堆积层古滑坡,因其位于四川省丹巴县甲居藏寨风景旅游区而广受关注。结合滑坡形成的地质环境条件,从滑坡形态、坡体结构、地表变形破坏发育特征等方面入手,对该典型堆积层滑坡进行了分析论述。研究表明,滑坡形成演化历史较为复杂,是一个多级多层滑动形成的非连续复合变形体,其变形复活与滑坡岩土结构、河流侵蚀和人类工程活动密切相关,滑坡具有长期间歇性蠕滑变形特征,以局部滑移为主,难以产生整体性变形破坏,进而为滑坡下一步的监测治理提供了依据。

Jiaju landslide is a huge ancient accumulation landslide, which has been paid so much attention to for being located in the Jiaju Tibetan villages scenery tourism area. This article analyses the typical accumulation landslide considering the geological environment, by configuration, structure, and development characteristic of its deformation and destruction, shows that it is a discontinuous comprehensive deformation mass which is formed by multistage and multi-layer sliding, and the history of formation and evolution is complicated. Its deformation and revival are closely related to earth-structure, river erosion and human engineering activity, and it has a character of longterm interval creep-sliding deformation, mainly partial slipping and sliding, that can hardly cause whole deformation and destruction. This research provides a basis to process next period of landslide monitoring and controlling.