Abstract: The safety monitoring of long tunnel with high water head has some special characteristics. In its safety monitoring design and instrument installation, monitoring items such as lining temperature, internal and external water pressure should be included. In this paper, some improvement suggestions, namely time and method of installation of monitoring instruments, the protection measures of optical cable as well as the way for mooring cable of anchor stress meter and the joint meter, are put forward and are successfully applied in projects, which is worthy of reference.

Key words: high water pressure, long tunnel, safety monitoring, FBG, installation, construction period, protection

摘要： 高水头、长隧洞的安全监测有其特殊性，针对该类项目的安全监测设计、仪器埋设，提出监测项目应包括内外水压力、衬砌温度等，对监测仪器的埋设安装时间、方法、引出尾缆的保护措施、锚杆应力计及测缝计的出缆方式提出了一些改进建议，在工程中成功应用，这些措施和方法可供设计、科研等相关单位参考。

关键词: 高水头, 长隧洞, 安全监测, FBG, 安装, 施工期, 保护