湖南洛塔白家坳滑坡体形成演化及其对中寨电站成库的影响

Formation and Evolution of Baijia'ao Landslide Mass and Its Impacts on the Reservoir Construction of Zhongzhai Power Station in Luota of Hunan

根据野外调查和钻孔资料重新查明了白家坳滑坡体的形态分布与结构特征以及发育深度的下界,重新勘定了滑坡体的西部边界。根据地质结构和地貌条件分析了白家坳滑坡体的形成条件,并推断其发育演化过程。滑坡体的松散堆积物与下伏断层破碎带以及岩溶发育带构成了水库渗漏的主要途径,尽管如此,滑坡体复活的可能性较小,宜采取分段处理的措施解决滑坡体的渗漏问题。

The morphological distribution and structure characters of Baijia＇ao landslide mass and lower bound of its development depth were confirmed again on the basis of wild investigation and drilling data and its west boundary was investigated and ascertained again.The formation condition of Baijia＇ao landslide mass was analyzed according to geological structure and geomorphic condition and its evolution process was deduced.The main paths for reservoir seepage were composed of loose deposit,fracture zone of bending-downward fault and development zone of karst of the landslide mass.However,the possibility for reactivation of landslide mass was less and it was better to solve the seepage problem of landslide mass by using segment treatment.