全圆隧洞洞壁双向防水施工技术

Bi-Directional Waterproof Construction Technology for Whole Circle Tunnel Wall

北京市南水北调配套工程采用全圆隧洞管线输水,为防止投入使用后输水隧洞内部水量的外渗损失及隧洞外部地下水进入隧洞内部,需要做好洞壁双向防水工作。在工程设计与施工中,采用了HDPE防水卷材预铺反粘及将隧洞全圆浇筑成一体等多项防水施工技术,很好地满足了工程需求,实现了工程的预期质量目标。

The water conveyance of whole circle tunnel pipeline is adopted in the Beijing South-to-North Water Transfer Auxiliary Project. The bi-directional waterproof of the tunnel wall needs to be done well to prevent the internal water seepage loss of the water conveyance tunnel and the groundwater in the external tunnel from entering into the internal tunnel after putting into operation. A lot of waterproofing construction technologies, such as the pre-paving and reversed bonding of high-density polyethylene waterproofing membrane and the casting of an integrated whole circle tunnel are adopted in the engineering design and construction, which completely meet the engineering requirements and achieve the expected quality objectives of the project.