三峡库区龙头山滑坡变形机制研究

Research on the Deformation Mechanism of Longtoushan Landslide in Three Gorges Reservoir Area

以三峡库区龙头山滑坡作为研究对象,研究库水位及降雨综合作用下滑坡体的变形机理及演化趋势。研究表明,滑坡体变形在空间上存在差异性,滑坡体中部、左侧前缘变形较大,中后部变形逐渐减小,表现出牵引滑动特征;降雨和库水位波动是滑坡体变形的主要影响因素,2次较大变形均与其叠加作用相关;从演化趋势上来看,滑坡体内不平衡应力得到不断释放,滑坡体变形趋势逐渐减缓,前期滑坡体变形受库水波动作用强烈,后期变形主要受降雨作用影响。

Taking the Longtoushan landslide in Three Gorges Area as an example, this paper explored the deformation mechanism and evolution tendency of slide body under the combined action of water level fluctuation and rainfall. The results show that displacement difference between different positions in space, showing a pull-type failure characteristic. Rainfall and water level fluctuation are dominant factors that induce the deformation, which are related to the two significant deformations. The evolution trend shows that deformation trend gradually slow down along with the release of the unbalance stress, water level fluctuation is the most important factor in the early stage, which is replaced by rainfall during later period.