Abstract: The automatic safety monitoring system of Bikou Dam was severely damaged in the Wenchuan Earthquake. The recovery and renovation process was introduced in this paper, together with different technical schemes. By using hydrostatic level in monitoring of liquid surface of bi-directional wire-alignment, accurate, stable and automatic monitoring of bi-directional displacement was achieved. The synchronous working of GSM wireless communication and RS485wired communication enhanced the integrity and applicability of the system. By application of three-grade lighting protection, the safety and reliable operation of the system was ensured. The operation experience showed that the renovation scheme was advanced and applicable, worthy reference.

Key words: Bikou dam, automation, renovation, safety monitoring

摘要： 2008年“5.12”地震导致碧口大坝安全监测系统受损严重。本文简要介绍碧口大坝自动化安全监测系统恢复改造工程及成果，并详细说明多种技术改造方案。通过采用静力水准仪监测双向引张线液面,实现了精确稳定的双向位移监测自动化；通过GSM无线通信与RS485有线通信同步工作，提升了系统工作的全面性和适用性；通过三级防雷措施，保证了系统的安全可靠运行。多种方法的使用和技术改造及实际应用表明，改造方案具有先进性和实用性。

关键词: 碧口大坝, 自动化, 改造, 安全监测