三峡水库区兴山后坝滑坡成因分析  

Formation mechanism for Houba Landslide of Xingshan County in the Three Gorges Reservoir Area

作　　者：艾飞[1] 侯天顺[1] 关国杰[1] 

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《中国地质灾害与防治学报》2008年第3期1-5,共5页The Chinese Journal of Geological Hazard and Control

摘　　要：文章通过对三峡水库区兴山后坝滑坡的地质、结构及变形特征研究以及稳定性分析,阐明了该滑坡成因和影响因素。研究发现,滑坡活动主要受地形地貌、地层岩性、人类工程活动以及降雨等因素的影响。运用剩余推力法对比分析天然及暴雨条件下不同层位的滑坡稳定性系数,得出在暴雨作用下滑坡表层滑带稳定性系数最小,不同滑带的稳定性受降雨的影响也各不相同,呈表层>浅层>深层的规律;这主要受滑带土的粘土矿物组分的影响。Based on the investigation of the characteristics of geology, structure and deformation of Houba landslide in Xingshan County, as well as the stability analysis; the influencing factors and formation mechanism of the landslide are analyzed in this study. It is found that the displacement of landslide is primarily controlled by topography, stratum and lithology, human engineering activities, and rainfall. Remaining push force method was employed to calculate the variation of the stability factors of different sliding zones from natural conditions to rainstorm conditions. Analysis result indicates that the effect degree of rainstorm on the stability of sliding zone of Houba Landslide decrease with an increase in depth, this phenomenon may be illustrated by the clay mineral composition of sliding zone.

关 键 词：后坝滑坡 影响因素 稳定性分析 剩余推力法 暴雨作用 三峡水库区 

分 类 号：P642.22[天文地球—工程地质学]