中国高混凝土面板堆石坝性状监测及启示

Performance of high concrete face rockfill dams in China and its inspiration

阐述了中国高混凝土面板堆石坝(坝高129 m以上)安全监测布置、监测仪器选型和数量以及监测主要成果,在分析了高混凝土面板堆石坝监测资料的基础上指出筑坝材料的变形特性、坝高和河谷形状是影响混凝土面板堆石坝工作形状的主要因素,提出了坝体沉降特征值Cs、坝体水平位移特征值CDu和CDd、周边缝位移特征值CDS、面板垂直缝位移特征值CDV和面板挠度特征值CDd的概念与表达式,目的是以利于表征面板堆石坝性状及其影响因素,研究了中国高混凝土面板堆石坝工作性状各特征值的分布规律,据此预估了300 m超高混凝土面板堆石坝坝体和面板变形性状以及接缝位移,指出建设300 m超高面板堆石坝在技术上是可行的,提出了300 m级超高面板堆石坝的设计理念、关键技术和研究重点。

The safety monitoring layout,instrumentation and results of high concrete face rockfill dams（more than 129 m in height） in China are presented.Based on the studies on the monitoring results,it is found that the deformation property of the dam material,the dam height and the valley shape have important effects on the performance of the dams.The concept and representation of characteristic values（Cs for settlement of dam body,CDu and CDd for displacement of dam body,CDS for displacement of perimeter joint,CDV for displacement of vertical joint of face slab and Cd for deflection of face slab respectively） are put forward,which is of great help to the description of the dam performance and its influencing factors.The deformation behaviors of dam body,face slab and joints of 300 m super-high concrete face rockfill dams are predicted by using the characteristic value method.The feasibility,design concept,key technology and further research direction for 300 m super-high concrete face rockfill dams are also proposed.