乌东德水电站金坪子滑坡变形监测综合分析

摘要

The Jinpingzi landslide is less than 1 kilometer away from the dam site of Wudongde Hydropower Station, and de-formation was found during the preliminary exploration stage of the construction, so it is necessary to carry out comprehensive mo-nitoring and analysis. On the basis of detailed investigation of the topography and geomorphology and geological structure of the Jinpingzi landslide, the landslide body was divided into 5 deformation areas, and a series of monitoring facilities were reasonably arranged to analyze the surface displacement, deep displacement and crack deformation. The monitoring results show that a seri-ous creep phenomenon existed in the key monitoring area ( DistrictⅡ) of the landslide and the landslide zone was obvious;there was a positive correlation between the landslide displacement deformation rate and the local rainfall, and the landslide generally lagged behind the rainfall for 1~2 months.%金坪子滑坡距离乌东德水电站坝址不足1 km,在电站前期工程勘察阶段即发现滑坡体存在位移迹象,因此有必要对其展开全面监测和分析。在对滑坡体地形地貌和地质构造详细勘察的基础上,将滑坡体划分为5个变形区,并合理布设了一系列监测设施以分析滑坡体的地表位移、深部位移、裂缝变形等。监测结果表明,金坪子滑坡重点监测区域(Ⅱ区)存在严重蠕滑,滑带明显,其位移变形速率与滑坡所处位置降雨量存在明显的正相关性,且约滞后于降雨1~2个月。