暴雨作用下铜仁地区典型滑坡变形机理研究

选取具有代表性的铜仁地区石灰溪滑坡作为典型滑坡进行案例研究,在滑坡工程地质条件基础上建立合理的石灰溪滑坡地质模型。基于饱和-非饱和渗流理论,采用Geo Studio 2004中的SEEP/W模块研究不同降雨强度(50,100,200 mm/d)情况下降雨1 d及7 d后的石灰溪滑坡渗流场演化特征及其规律;基于极限平衡理论,采用SLOPE/W模块研究在以上不同降雨强度作用下石灰溪滑坡在降雨中及降雨后1~7 d的稳定性演化特征及规律。通过研究,总结了石灰溪滑坡的变形机理,对该地区同类型滑坡变形机理进行理论探讨。

Study on deformation mechanism of typical landslide triggered by rainstorm in Tongren area of Guizhou Province

With the landslide in Shihuixi village of Tongren, Guizhou Province as a study case of typical landslide, a geolog-ical model for Shihuixi landslide on the basis of its engineering-geological conditions is established. Based on saturated-unsat-urated seepage theory and by applying SEEP/W module in GeoStudio 2004, the evolutionary features and laws of Shihuixi land-slide seepage field are studied under different rainfall intensity (50mm/d、100mm/d、200mm/d) for the first day and the seventh day after the rainfall. Based on the theory of limit equilibrium and SLOPE/W module, the evolutionary features and laws of the stability of Shihuixi landslide are investigated under the effect of different rainfall intensity during the rain process and from the first day to the seventh after the rain. The deformation mechanism of Shihuixi landslide is summarized and a theoretical explora-tion of the deformation mechanism of landslides of the same type in this region is conducted.