瀑布沟水电站大型地下厂房快速开挖施工技术研究

Study on Fast Excavation Technology of Large-Scale Underground Powerhouse of Pubugou Hydropower Station

瀑布沟水电站地下厂房开挖工程不仅规模大、地质条件复杂,而且对工期要求非常紧迫。通过技术方案优化,首台机组开挖的净工期不足24个月,对比国内同类型、同规模地下厂房工程,该工程首台机组创造了开挖时间最短的全国之最。依托该工程,开展了大型地下厂房安全快速施工技术研究,所取得的成果可为地下工程施工具有共性的施工组织、控制爆破、围岩稳定、施工安全等问题提供重要的参考经验,将有力提升地下工程设计、施工技术水平,具有广阔的应用前景。

The excavation work of the underground powerhouse of Pubugou Hydropower Station is not only large in scale and complex in geological conditions,but also very urgent in construction period.By optimizing the technical scheme,the net excavation period of the first generator is less than 24 months.Compared with the same type and scale of underground powerhouse projects in China,the first generator excavation has created the shortest excavation time in China.Based on this project,the research on safety and fast construction technology of large-scale underground powerhouse has been carried out.The results obtained can provide important reference experience for similar construction organization,controlled blasting,surrounding rock stabilization,construction safety and other issues in underground construction,which will effectively improve the level of underground engineering design and construction technology and have broad application prospects.