面板堆石坝深厚覆盖层安全监测资料分析——以宁海县西林水库为例

Analysis of Safety Monitoring Data of a Face Rockfill Dam on Thick Overburden Layers: A Case Study of Xilin Reservoir in Ninghai County

由于深厚覆盖层的结构松散、条件复杂、岩性变化显著,在深厚覆盖层上建坝容易产生不均匀沉降和坝基渗漏等问题,所以在深厚覆盖层上筑坝一直是水利水电工程亟须解决的重点技术问题。对深厚覆盖层上的面板堆石坝(西林水库大坝)坝基覆盖层的沉降、面板周边缝和坝基渗流安全监测数据进行分析,结果表明,西林水库坝基深厚覆盖层沉降稳定合理,透水性良好,覆盖层内防渗墙工作状态正常。

Because of unconsolidation,complex conditions,and significant changes in lithology of thick overburden layers,construction of dams on thick overburden layers is prone to engineering problems such as uneven settlement and dam foundation leakage.Therefore,dam building technique on thick overburden layers is a key technical problem to be solved.This paper analyzes the settlement and seepage data of the overburden layer of a face rockfill dam.Analysis results show that the thick overburden layer of the Xilin Reservoir dam foundation is stable and permeable.The cutoff wall in overburden layer runs well.