福建永泰上新厝滑坡发育过程及形成机理分析

Analysis on the Development Process and Formation Mechanism of Shangxincuo Landslide in Yongtai County,Fujian Province

台风暴雨条件下滑坡岩土体的非饱和土水耦合机制是制约滑坡发展的主要因素。目前,对于极端强降雨条件下的滑坡演化过程和形成机制研究成果较少。为此,以福建永泰上新厝滑坡为研究对象,通过大量现场地质调查、勘探、室内岩土体试验获取滑坡基本特征数据。以此为基础,建立滑坡非饱和土力学模型和渗流模型。通过计算和实际对比,逐步反演出滑坡的渗流状态、变形状态以及降雨对滑坡的影响过程,最终得出滑坡的形成机制。

The coupling mechanism of unsaturated soil and water is the main factor restricting the development of landslide. At present, there are few researches on the evolution process and formation mechanism of landslide under the condition of extreme heavy rainfall. Therefore, taking ShangXinCuo landslide in Fujian province as the research object, the basic characteristic data of landslide were obtained through a lot of investigation, exploration and laboratory tests. On this basis, the mechanical model and seepage model of unsaturated soil were established. Through the calculation and the actual comparison, the seepage state, deformation state and the influence process of rainfall on the landslide are gradually reversed, and the formation mechanism of the landslide is finally obtained.