浅谈双膜盲沟网在盘道岭隧洞洞身排水上的应用

Discussion of application of double membrane blind ditch network in the drainage of Pandaoling Tunnel

盘道岭隧洞作为引大入秦工程的"咽喉",其安全运行直接影响到引大入秦工程的供水保证率。目前洞内仍存在隧洞裂缝和洞身渗水等安全隐患,为解决以上问题,在盘道岭隧洞加固改造中,将双膜盲沟网沿隧洞洞身裂缝安装,利用渗水层和排水体将隧洞地下渗水导出衬砌混凝土以外,降低渗水压力,排除渗水对新浇筑混凝土的渗透破坏,保证隧洞衬砌混凝土施工的质量,实施效果良好。

Pandaoling tunnel as the "throat" of the project of bring the Datong river into the Qinwangchuan basin, its safe operation directly affected the water supply guarantee rate of the project. At present, there are still some hidden dangers in the tunnel, such as cracks and seepage of the tunnel body. In order to solve the above problems, in the reinforcement and reconstruction of Pandaoling Tunnel,The double-membrane blind ditch network is installed along the cracks in the tunnel body, and the underground seepage water of the tunnel is used to derive the lining concrete outside the seepage water layer and drainage water body, so as to reduce the seepage pressure, eliminate the infiltration damage of the seepage water to the newly poured concrete, and ensure the quality of the concrete construction of the tunnel lining, and good results have been achieved by using double-membrane blind tunnel network for tunnel body drainage.