岑水高速六活口滑坡稳定性分析与治理研究

为研究路堑边坡开挖后滑坡的变形失稳特征,以六活口滑坡为例,在工程地质勘察的基础上,分析了滑坡变形破坏与形成机理,并结合极限平衡分析和数值模拟计算,再现了六活口滑坡的变形破坏过程。认为该滑坡为推移式切层破碎岩土滑坡,存在浅层和深层滑面,由于第一次削坡卸载治理未及时完成,导致坡面长时间暴露,坡体应力经松弛、集中的重新调整,同时受降雨等不利因素的影响而再发生开裂、坍塌等变形。根据分析结果提出二次削坡和补充治理措施,有效地阻止了滑坡的进一步发展,确保了滑坡保持长期稳定状态。

Slope stability evaluation of Liuhuokou Landslide on Censhui Highway and its treatment

To study the deformation and instability characteristics of landslide formed by slope cutting, the deformation and failure of Liuhuokou Landslide and its evolution mechanism are analyzed based on engineering geological survey. The deformation and failure process of Liuhuokou Landslide is represented through limit equilibrium analysis and numerical simulation. It is con-cluded that the landslide is a thrust-load-caused approaching bedding slide of fractured rock and soil, in which shallow and deep sliding faces exist. As the first slope cutting for loading was not completed in time, the slope surface was exposed for an un-duly long period, causing the re-deformation including cracking and collapse as a result of the adjustment of the slope stress through relaxation and concentration plus the adverse factors like rainfall. Through analysis, second slope cutting and supplemen-tary control measures are put forward, which can effectively prevent the further deformation of the slide and ensure its long-term stability.