Novel water-stop and sealing dual-purpose water-stop belt for secondary lining end part of tunnel

Abstract

The invention discloses a novel water-stop and sealing dual-purpose water-stop belt for a secondary lining end part of a tunnel. The water-stop belt comprises a back-sticking water-stop belt unit usedfor being stuck to a circumferential waterproof plate of the tunnel, a middle embedded water-stop belt unit used for being embedded into a secondary lining concrete structure layer of the tunnel, andan elastic unit connected between the back-sticking water-stop belt unit and the middle embedded water-stop belt unit. The elastic unit is telescopic so as to regulate a gap between the back-stickingwater-stop belt unit and the middle embedded water-stop belt unit. By using and cooperating the novel water-stop and sealing dual-purpose water-stop belt for the secondary lining end part of the tunnel with a lining multifunctional end part shaping steel mold of the tunnel, a circumferential middle embedded water-stop belt and a back-sticking water-stop belt of the secondary lining end part of the tunnel can be completely replaced; an effect of sealing a gap of an end part formwork can be achieved on the premise of ensuring the embedding quality of the water-stop belt; the installation quality of the water-stop belt is ensured; and meanwhile, the concrete construction quality of the secondary lining end part of the tunnel is ensured.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, and more specifically, the invention relates to a novel dual-purpose water stop belt for water sealing and sealing at the end of the second lining of the tunnel. Background technique [0002] The traditional secondary lining end circumferential construction joints in my country's tunnel engineering adopts the installation of circumferential mid-buried waterstop and back-mounted waterstop at the center of the lining thickness, through which the mid-buried waterstop and back-mounted waterstop The two ends of the belt enter the old and new concrete on both sides of the construction joint respectively, and the circular construction joint is closed to play the role of water stop. This construction method is difficult to construct, or the buried position of the buried water stop is not centered, or the buried water stop at the end is deflected, which reduces the water stop effect of the wate...

AI Technical Summary

Problems solved by technology

[0003] The traditional tunnel secondary lining end sealing process is to use wooden boards for sealing. This method has the disadvantages of using a large number of wooden boards, slow end sealing work, many gaps between the boards, large gaps are easy to leak slurry, and difficult to fix the ends of the boards.

And when the planks pass through the buried waterstop, it is necessary to bend the buried waterstop, which is very difficult to operate

[0004] The newer tunnel secondary lining end sealing process is the tunnel lining end multifunctional shaped steel formwork construction process. In this process, two inner and outer shaped steel forms are used to clamp the buried waterstop to fix the buried waterstop. This process solves the problem of installation quality of the buried waterstop, but due to the deviation of the tunnel formation, it is necessary to install a sealing steel plate on the outer shaping mold to seal the gap between the waterstop and the tunnel circumferential waterproof plate However, there are many openings on the outer sizing form, and it is difficult to completely seal the gap with the circumferential waterproof plate, resulting in too much grout leakage at the end when pouring concrete, which affects the quality of the secondary lining

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