Abstract: Timely and accurate information about the safety status of underground powerhouse cavern during excavation of construction is needed for construction guidance and design feedback. To play the role of safety monitoring and early warning, the establishment of temporary automatic monitoring system before excavation of the underground powerhouse cavern of Shuangjiangkou hydropower station is of great importance, which aims to monitor the deformation of surrounding rock caused by relief of high ground stress and blasting, as well as to adjust the support force. This paper mainly introduces the design, planning and warning measures of the temporary automatic monitoring system of Shuangjiangkou hydropower station, for reference.

Key words: cavern group, construction period, safety monitoring, automatic monitoring during construction period, safety warning

摘要： 为了及时、准确掌握施工期地下厂房洞室群开挖过程中的安全性态，指导现场安全施工和反馈设计，双江口水电站需要在地下厂房洞室群大规模开挖前完成安全监测临时自动化系统的建设，实时捕捉施工过程中由高地应力释放、开挖爆破等因素引起的围岩变形及支护应力调整，发挥施工现场安全监测预警功能。笔者从地下厂房洞室群施工期临时自动化系统建设的必要性和重要性入手，结合工程实例，阐述施工期安全监测临时自动化系统建设的设计思路、规划方案与预警手段，为今后类似工程的设计提供参考和借鉴。

关键词: 洞室群, 施工期, 安全监测, 施工期监测自动化, 安全预警