Inverted arch steel end die and construction method thereof

Abstract

The invention provides an inverted arch steel end die and a construction method thereof. The steel end die comprises an upper steel end die (1) of an arc structure and a lower steel end die (2) of an arc structure. The lower end of the upper steel end die (1) is connected with the upper end of the lower steel end die (2) through vertical bolts (3), and one end of a circumferential steel edge water-stop belt (4) of an inverted arch is clamped between the upper steel end die (1) and the lower steel end die (2). The construction method comprises the following steps that firstly, the lower steel end die (2) is assembled into a whole, and a first layer inverted arch rebar penetrates through the lower steel end die (2) through rebar preformed holes (5); secondly, the circumferential steel edge water-stop belt (4) of the inverted arch is installed; thirdly, a second layer inverted arch rebar penetrates through the upper steel end die (1) through rebar preformed holes (5); and fourthly, the upper steel end die (1) and the lower steel end die (2) are tightly fixed through the vertical bolts (3), and after the exterior of the inverted arch steel end die is simply reinforced and supported, inverted arch concrete can be constructed. Installation is easy, and installing joint cracks can be effectively reduced.

Description

technical field [0001] The invention relates to an inverted arch end formwork, and more specifically relates to an inverted arch steel end formwork and a construction method thereof, belonging to the technical field of inverted arch construction of railway and high-grade highway tunnels. Background technique [0002] The inverted arch of the tunnel is a reverse arched structure set at the bottom of the tunnel to improve the stress condition of the upper support structure. The inverted arch is generally a reinforced concrete structure. The load on the road surface is effectively transmitted to the underground, and on the other hand, it can effectively resist the reaction force from the lower layer of the tunnel. [0003] Tunnel inverts and invert fillings are poured independently. The inverted arch design is an arc-shaped force-bearing structure. At present, wooden formwork is usually used to seal the end of the inverted arch. However, this kind of wooden formwork plugging ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing inverted arch wooden formwork cannot be effectively centered and fixed in the center of the buried steel edge waterstop in the inverted arch ring, and the longitudinal and circumferential spacing of the steel bars and the thickness of the protective layer cannot be controlled according to the design requirements, etc., to provide a Inverted arch steel end formwork and its construction method

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