Abstract: There are some great technical challenges and management risks in safety management of extra high arch dams, and the on-line safety monitoring is one of important technical means to ensure the dam safety. In this paper, the on-line monitoring technology scheme of Jinping I arch dam is discussed, and the key technology of on-line monitoring is studied. On the basis of dam safety information management system, the on-line monitoring system is developed, which realizes the target of real time monitoring of dam safety.

Key words: safety management of dam operation, on-line monitoring, validity of monitoring data, structural safety evaluation, structural calculation

摘要： 特高拱坝运行安全管理工作存在着较大的技术挑战和管理风险，大坝安全在线监控是保障大坝运行安全的重要技术手段之一。文章探讨了锦屏一级拱坝在线监控技术方案，对在线监控的关键技术进行了研究。在大坝安全信息管理系统的基础上，研发了在线监控系统，实现了实时监控大坝安全的目标。

关键词: 大坝运行安全管理, 在线监控, 监测数据有效性, 结构安全评判, 结构计算