摘要
富水区深埋隧洞的地下水问题对隧洞修建的可行性及施工具有重大影响。简要地分析了高水位富水区隧洞建设中的主要水问题,结合锦屏二级水电站深埋长隧洞工程,对高水位富水区深埋隧洞工程中的主要水问题进行了较为系统的分析,以及关于水问题对隧洞建设的影响作出了初步评价。提出了锦屏工程深埋引水隧洞采用“以堵为主,堵排结合”的治水思路,通过对围岩高压固结灌浆、封堵地下水等措施,并利用灌浆圈围岩和隧洞衬砌支护的联合承载功能,确保围岩和衬砌支护结构的稳定、安全,使涌水量也得到有效控制。
Water problems will make important influence upon the feasibility and construction of the deep-lying long tunnels located in water-rich regions. The water problems in the construction of those tunnels are briefly analyzed. Combining with the deep-lying long tunnel of Jinping Stage 2 Hydropower Station, the related water problems are fully analyzed, and their impacts on construction are evaluated. A new water control principle of preventing the subsurface water with draining is put forward for Jinping tunnel. By high-pressure concretion grouting, the subsurface water can be prevented, and the surrounding rock masses in grouting zone and the supporting structures can be combined to bear loads. As a result, surrounding rock masses and supporting structures are stable and safe, and the quantity of seepage can be effectively controlled.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2004年第11期1924-1929,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
深埋长隧洞
富水区
水问题
对策
Construction
Hydroelectric power plants
Rocks
Water
