A formwork used for the construction of railway tunnel inverted arches and its construction method

Abstract

The invention provides a formwork for railway tunnel inverted arch construction and a construction method of the formwork. The formwork comprises a truss girder and end supporting structures used for supporting the two ends of the truss girder. The bottom end of the truss girder is detachably connected with a plurality of inverted arch forms, and the inverted arch forms are hinged into a whole. The truss girder is formed by splicing a plurality of truss girder units in the longitudinal direction. The length of the inverted arch forms is adjusted by selecting a proper number of truss girder units according to the construction length of a tunnel inverted arch. According to the formwork, the problems that a traditional tunnel inverted arch is low in construction efficiency, forms are poor in stability, and concrete below the forms is hard to vibrate are solved.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a formwork used for the construction of an inverted arch of a railway tunnel and a construction method thereof. Background technique [0002] The inverted arch is one of the main components of the railway tunnel structure and the foundation of the tunnel structure. On the one hand, setting an inverted arch in the construction of a railway tunnel can make the support structure form a closed structural system, improve the overall mechanical performance, and control the development of convergent displacement around the tunnel and plastic deformation of the surrounding rock mass. On the other hand, during the use of the tunnel, the inverted arch can effectively transmit the ground pressure on the upper part of the tunnel through the tunnel side wall structure or the load on the road surface to the underground, and can also effectively resist the reaction force from the lower part o...

AI Technical Summary

Problems solved by technology

This process is not conducive to the stability of the surrounding rock, nor is it conducive to the simultaneous work of different types of personnel, resulting in idle personnel and economic losses

[0007] 4. The traditional integral formwork cannot be disassembled and occupies a large area. The positioning of the formwork is time-consuming, laborious, difficult, and inconvenient for transportation.

[0008] 5. The bearing capacity of the existing inverted arch construction formwork is not large enough, and the entire inverted arch formwork is prone to problems such as deformation, offset, and floating during the construction process

[0009] 6. The concrete poured under the formwork cannot be vibrated in time, which seriously affects the quality of the inverted arch after construction

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