锦屏二级水电站深埋长隧洞群的建设和工程中的挑战性问题_吴世勇.pdfVIP

第29 卷 第11 期 岩石力学与工程学报 Vol.29 No.11 2010 年11 月 Chinese Journal of Rock Mechanics and Engineering Nov. ，2010 锦屏二级水电站深埋长隧洞群的建设和 工程中的挑战性问题 吴世勇，王 鸽 (二滩水电开发有限责任公司，四川 成都 610051) 摘要：锦屏二级水电站大型深埋隧洞群由 4 条引水隧洞、2 条辅助洞及 1 条施工排水洞组成，隧洞群总长约 118 km，具有埋深大、洞线长、洞径大、地应力水平高、工程地质条件极其复杂、施工布置困难等特点，是目前 世界上己建、在建总体规模最大、综合难度最大的水工隧洞群工程。隧洞群建设中面临地下水预报与处理、岩爆 防治等关键技术问题。通过对锦屏二级水电站深埋隧洞群建设中遇到岩爆及突涌水工程治理等工程应用实例进行 研究总结，提出下一步工程中所面临的挑战及应对措施。锦屏二级水电站工程深埋长隧洞的建设所取得的经验， 可为类似工程提供有益的借鉴。 关键词：隧道工程；锦屏二级水电站；地下工程；岩爆；地下水 中图分类号：U 45 文献标识码：A 文章编号：1000 –6915(2010)11 –2161 –11 CHALLENGE ISSUES IN CONSTRUCTION AND PROJECT OF LARGE-SCALE DEEP-BURIED TUNNEL GROUP OF JINPING II HYDROPOWER STATION WU Shiyong ，WANG Ge (Ertan Hydropower Development Co .，Ltd .，Chengdu，Sichuan 610051，China) Abstract ：Jinping II hydropower station includes four diversion tunnels，two auxiliary tunnels and one drainage tunnel ，with a total tunnel length of 118 km. These tunnels are characterized as thick overburden ，long length， large size in diameter，high geostress ，complicated engineering geological conditions and high difficulty for project layout ，which make the tunnel project the largest and most difficult hydro-tunnel group in the world. Key technical problems were met during the tunnels excavation ，including the forecast and treatment of groundwater， and the prevention of rock burst. The studies and measures adopted against rock burst，the gushing water and the instability of surrounding rock mass during the construction of tunnels are summarized. The experience accumulated during the construction of the tunnels in Jinping II