Abstract: The main bridge of Zigong Fushun Tuojiang River Grand Bridge of southern Sichuan intercity railway is located in the reservoir area of Huangnitan hydropower station, which is close to the power station (only about 155~262m away from the dam). Therefore, the bridge construction may affect the safe operation of the power station.Taking this as an example, the safety assessment methods of the current situation of the power station and the influence of the bridge construction period and the operation period on the power station were introduced. The state inspection method and parameter review method were mainly used in the current situation assessment, the standard conformity inspection method was mainly used in the safety assessment in the construction period, and the dynamic analysis method and the special evaluation method were mainly used in the safety assessment in the operation period.Thus, a whole set of safety assessment methods for the impact of bridge construction on the operation of power station in the reservoir area was formed, and specific measures to reduce or eliminate safety threats were proposed. The results show that the proposed assessment method provides effective optimization suggestions for the bridge design,provides guidance for the construction and operation of the bridge and the daily management of the power station, and realizes the operation safety of the power station.

Key words: water conservancy and hydropower engineering, high-speed railway, bridge construction, power station operation, safety assessment

摘要： 川南城际铁路自贡富顺沱江特大桥主桥位于黄泥滩水电站库区内，与电站距离较近(距大坝仅约155~262 m)。因此，桥梁建设可能对电站安全运营造成影响。以此为例，介绍了电站现状评估、桥梁施工期和运营期对电站影响的安全评估方法，其中现状评估主要运用状态检查法和参数复核法，施工期安全评估主要运用规范符合性检查法，运营期安全评估主要运用动力分析法和专项评价法，从而形成在库区内建设桥梁对电站运营影响开展安全评估的整套方法，并提出减小或消除安全威胁的具体措施。结果表明：该评估方法为桥梁的设计提供了有效的优化建议，为桥梁的施工和运营及电站的日常管理提供了指导意见，实现了电站的运营安全。

关键词: 水利水电工程, 高速铁路, 桥梁建设, 电站运营, 安全评估