Abstract: The main dam of upper reservoir of a pumped storage power station is the highest among pumped storage power stations worldwide, and the largest reservoir basin filling project in China. Accurate and long-term monitoring of the settlement of reservoir basin and main dam is very important for understanding the later operation of this project. Therefore, the internal settlement monitoring design is targeted, mainly adopting the scheme of tube settlement gauge that is currently most used in China. Due to the complexity of buried pipelines, some improvements have been made in the conventional scheme. According to current monitoring results, the instruments work well, and the monitoring results are in good agreement with the values measured by structural calculation, which can provide engineering reference for other similar projects powevstaation.

Key words: pumped storage power station, rockfill dam, settlement, monitoring

摘要： 某抽水蓄能电站上水库主坝为世界最高的抽水蓄能电站大坝，也是目前国内规模最大的库盆填筑工程， 准确、长期监测主坝和库盆的沉降对了解工程运行情况极为重要。因此，针对性进行了堆石体内部沉降监测设 计，主要采用目前国内使用最多的水管式沉降仪方案，由于设备埋设管路的复杂性，在常规方案上做了一定改进 和优化。从目前的监测结果看，仪器使用效果良好，监测结果与结构计算测值分布吻合度较高，可为其他类似工 程提供借鉴。

关键词: 抽水蓄能电站, 堆石坝, 沉降, 监测