糯扎渡水电站高心墙堆石坝监测设计创新与实践

Innovation and Practice on Monitoring Design of Nuozhadu High Core Rockfill Dam

针对高心墙堆石坝的大变形、高应力和高水头对监测设计布置、仪器设备选型和施工带来的难题,在糯扎渡心墙堆石坝的监测设计中,对心墙、上下游堆石体以及界面错动变形、应力监测等方面进行了一系列改进和创新,以全面适应超高坝的工作特性。从监测结果来看,糯扎渡心墙堆石坝监测仪器经历了4个填筑期的考验,初期蓄水期间各监测仪器工作状态正常,为工程安全评价、设计反馈、施工指导等提供了重要参考。

For dealing with the problems of monitoring system design, equipment selection and system installation in high core rockfill dams caused by the large deformation, high stress and high water pressure, a series of improvements and innovations are carried out in the monitoring design of Nuozhadu Core Rockfill Dam in order to adapt the operation characteristics of ultra- high rockfill dam, including the deformations and stresses monitoring of core wall, rockfill bodies on upstream and downstream and interface dislocation. The monitoring results show that the operating status of monitoring instruments in initial water storage stage is normal after affected by four-period filling of dam. The results also provide important references to engineering safety assessment, design feedback and construction guidance.