广东和平县东山岭滑坡特征及防治对策

Features and Treatment Schemes of Dongshanling Landslide in Heping County of Guangdong

根据现场工程地质调查结果,深入分析了东山岭滑坡的自然地质环境条件、空间分布形态和变形破坏特征,探讨了东山岭滑坡的形成原因,并采用滑坡剩余推力传递法对东山岭滑坡在不同工况下的稳定性进行了计算和评价。研究结果表明,东山岭一带高陡的山体斜坡地形和结构松散的厚层风化残坡积土是形成滑坡的内因,人工切坡和强降雨作用是东山岭滑坡活动的主要诱发因素。依据东山岭滑坡的稳定状态和发展趋势,提出了"削坡卸荷和筑坝填土"的滑坡治理工程方案治理东山岭滑坡。

According to the results of on-site engineering geological investigation, the geological and environmental conditions, the characteristics of spatial distribution and deformation failure are analyzed for the landslide in Dongshanling, with the forming reason of landslide discussed. Using the method of residual thrust transfer, the stability of the landslide is computed and evaluated under the natural conditions and the rainstorm conditions. It is found that loose, thick residual soil and high-steep clinoform landscape are the internal causes of forming landslide. Meanwhile, artificial cut-slope and heavy rainfall are the triggering factors of causing landslide. At last, the treatment schemes of cut slope -unloading and constructing dam-filling soil were put forward for Dongshanling landslide according to the stability and developing tendency of it.