Rainfall Sensitivity Analysis of Colluvial Landslide in Three Gorges Reservoir——A Case Study of Tangjiao 2# Landslide in Wanzhou Area
详细信息
- 责任者：Lü Dayang (Chongqing Survey Design and Research Co. ; CREEC ; Chongqing 400023 ; China)
- 刊名：Guizhou Geology
- 出版年：2013
- 卷期：30(3)
- 关键词：滑坡 ; landslides ; 大气降水 ; atmospheric precipitation ; 长江三峡 ; Yangtze Three Gorgees
- 页码：p.223-226,239
- 图表：5 illus., 5 refs.
- 分类号：1702
- issnNo：ISSN1000-5943
- isbnNo：CN52-1059/P
摘要
Colluvial landslide is the main type of landslide in the Three Gorges Reservoir area,it is easy to be induced by rainfalls. landslide respond to rainfalls in a dynamic manner under different engineering geological conditions. Area B of Tangjiao 2# landslide in Wanzhou was taken as a case to explore its physical- mechanics basic feature of rock- soil media and deformation- failure mechanism in this study. Based on these,MSARAM was used to analyze its sensitivity to rainfall. The results shows that the deformation- failure mechanism is shear failure which is creeping- along rock- soil interface. Its stability will decline in the case of heavy rain. On the normal water level( 175 m),Landslide will take place when the intensity of rainfall is 20mm / d; On the low water lever( 145m),the intensity of rainfall is 50 mm / d. Thus,the influence of the inducing factor such as the water lever of reservoir and intensity of rainfall etc. should be taken into account when the proventing and controlling measures are made.