赣东地区小型牵引式残坡积土质滑坡稳定性及破坏模式分析

通过野外调查,较全面地研究了赣东地区小型牵引式残坡积土质滑坡的区域地质环境和水文、工程地质条件,结合反演分析及折线滑动法计算滑坡稳定性系数等手段,对滑坡在两种工况下的稳定性进行了定量探讨,在此基础上分析了滑坡成因和可能的失稳破坏模式。针对小型牵引式残坡积土质滑坡失稳破坏模式分析得出:小型牵引式残坡积土质滑坡破坏模式经历三个阶段:前期蠕变—坡体蠕动阶段、中期变形—滑动面贯通阶段、后期破坏—滑坡破坏阶段。

Stability and failure mode analysis of small traction residual slope soil landslide in Eastern Jiangxi Province

Based on the field investigation, this paper comprehensively studies the regional geological environment, hydrological and engineering geological conditions of small tractive landslide in Eastern Jiangxi Province. Combined with back analysis and broken line sliding method to calculate the stability coefficient of landslide, the stability of landslide under two working conditions is quantitatively discussed. On this basis, the causes of landslide and possible instability are analyzed pattern. According to the analysis of the instability failure mode of small tractive soil landslide, it is concluded that the failure mode of small tractive soil landslide can be divided into three stages: 1) early creep--slope creep stage, 2) middle deformation--sliding surface through stage, 3) late failure-- sliding slope failure stage.