Abstract: Excavation of underground powerhouse and support is crucial to control the construction period of Xianyou pumped storage power station project. The paper summarizes the experience of excavation of underground powerhouse in aspects such as excavation procedure and method, support method, quality and time limit and et al. As well, the paper stresses on the contents of the distribution of underground construction tunnels and layered excavation, time limits and input resources for excavation of different layers, disturbance of excavation on surrounding rocks and their deformation. Further, the main influence factors in excavation construction are pointed out and the suggestions for improvement are presented, for reference.

Key words: underground powerhouse, construction, quality, Xianyou pumped storage power station

摘要： 仙游抽水蓄能电站地下厂房开挖和支护是控制工程直线工期的关键线路。从工程开挖施工程序和方法、支护方法、质量及工期等方面对地下厂房开挖进行了探索和总结，重点介绍了仙游抽水蓄能电站地下厂房施工通道布置与开挖分层、各分层开挖工期与资源投入以及开挖过程中对周围岩体的扰动破坏、围岩变形等情况，分析了影响工期的主要因素及需改进的主要方面，对类似工程施工组织设计具有借鉴意义。

关键词: 地下厂房, 施工, 质量, 仙游抽水蓄能电站