Seamless sealing formwork for tunnel secondary lining

Abstract

The invention discloses a seamless sealing formwork for tunnel secondary lining, and belongs to the field of tunnel lining construction devices. The seamless sealing formwork comprises a support base and a rubber air bag, and the support base and the rubber air bag are arranged at the front end of a lining trolley in the circumferential direction; the support base is arranged on a steel formwork at the front end of the top of the lining trolley, and the rubber air bag is arranged between initial supporting lining and the supporting base and is in an extrusion state. The seamless sealing formwork further comprises an ejecting rod clamp and a spiral ejecting rod; the ejecting rod clamp is horizontally connected to the front of the side of the support base, and the spiral ejecting rod perpendicularly penetrates through the ejecting rod clamp and fixed through a rotating wheel of the ejecting rod clamp. The rubber air bag and the lining trolley are combined for use, voidless close sealing between the initial supporting lining concave-convex jetting concrete surface and the steel formwork of the lining trolley can be effectively guaranteed, and the problem that due to a traditional method of adopting a wooden formwork for sealing the end, the formwork is not watertight and leaks slurry is avoided.

Description

technical field [0001] The invention relates to a construction device for tunnel lining, in particular to a seamless sealing template for secondary lining of tunnels. Background technique [0002] With the extensive construction of tunnel engineering, the use of lining trolleys for tunnel secondary lining has been widely promoted. However, in modern traffic, in order to prevent the underground water in the tunnel from destroying the lining concrete, a layer of non-woven fabric and a waterstop are usually arranged between the primary concrete surface and the secondary lining concrete. During the construction of the second lining, the end of the lining trolley is sealed with a combined wooden formwork. In view of the concavo-convex condition of the primary concrete surface, it is easy to cause the plugging not to be dense and cause slurry leakage when the secondary lining is applied; the wooden formwork of the plug has a certain rigidity and may cause damage to the waterproof...

AI Technical Summary

Problems solved by technology

In view of the concavo-convex condition of the primary concrete surface, it is easy to cause the plugging not to be dense and cause slurry leakage when the secondary lining is applied; the wooden formwork of the plug has a certain rigidity and may cause damage to the waterproof board or waterstop; the general combined formwork is used for sealing The end of the waterstop needs to be folded into a 90-degree angle, which is likely to cause damage or skew of the buried waterstop

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