反粘式防水板在客运专线隧道衬砌防排水中的应用研究

Application Study on Anti-adhesive Waterproof Board in Tunnel Lining of Passenger Dedicated Line

隧道施工中,传统防水板与混凝土面的密贴性较差,在隧道初支面凹凸不平整时,极易形成皱褶,背后形成空鼓,特别是在寒区山岭隧道中,防水板背后空鼓可能会聚集水,冬季寒冷季节发生冻胀,对隧道结构造成破坏,威胁运营安全。反粘式防水板体系主要包括反粘式防水板、盖口条、固定垫片和土工布。施工中采用反粘法先铺设防水板,然后在防水板的高分子自粘胶表面上浇筑二衬硅酸盐水泥混凝土结构,防水板与后期浇筑的二衬混凝土结构形成紧密附着粘结的结合效果。

In the tunnel construction, the closely fitting performance between traditional waterproof board and the concrete surface is poorer, when the surface is uneven as concave and convex, it is easily leading to form folds and empty drum. In particular, the empty drum behind the waterproof board may gather water in cold mountain tunnel, leading to frost heave in winter cold season which damages to the tunnel structure and operations. The anti-adhesive waterproofing system mainly includes the waterproofing board, covering slip, fixed gasket and soil cloth. The waterproofing board is firstly laid in construction by anti-adhesive method, and then second lining silicate cement concrete is poured on the board surface with high polymer self-adhesive structure, so as to achieve the close adhesive effects after forming the structure of the waterproofing board and second lining concrete.