A prefabricated secondary lining structure for underground excavation tunnel and its construction method

Abstract

The invention discloses a fabricated secondary lining structure of a bored tunnel and a construction method of the fabricated secondary lining structure. The fabricated secondary lining structure of the bored tunnel comprises a plurality of circles of splicing structures sequentially arranged in the extending direction of the tunnel. Each circle of splicing structure comprises a plurality of splicing blocks. The adjacent splicing blocks in the same circle of splicing structure are connected through a plurality of connecting devices arranged on the edges of the splicing blocks in the circumferential direction. The adjacent splicing blocks in the different circles of splicing structures are connected through connecting devices arranged on the edges of the splicing blocks in the extending direction of the tunnel. According to the fabricated secondary lining structure of the bored tunnel and the construction method of the fabricated secondary lining structure, working conditions can be improved, labor can be saved, and a large number of temporary materials can be saved. Standardization, mechanization and industrialization of the secondary structure of the bored tunnel are achieved, and the construction efficiency and industrialization level of the secondary lining structure are improved.

Description

technical field [0001] The invention relates to the technical field of civil engineering construction, in particular to an assembled secondary lining structure of a tunnel excavated and a construction method thereof. Background technique [0002] At present, domestic shield tunnel design and construction, shield machine equipment, research and application technology are relatively mature, but the origin and reception of shield tunnels have higher requirements on site conditions, which may The shield method cannot be used for construction. Underground excavation tunnels are suitable for various line conditions, and its construction method has the advantages of low construction site requirements, flexible organization, and easy guarantee of construction period, so it occupies a certain proportion in subway construction. Therefore, improving the construction efficiency of the secondary lining of underground excavation tunnels, improving the on-site operating environment, impro...

AI Technical Summary

Problems solved by technology

[0007] (3) The water stop belt of the construction joint joint is not firm;

[0009] (5) The structure pouring is not dense;

[0010] (6) Poor control of structural thickness;

[0012] It can be seen that the cast-in-place secondary lining structure of tunnels in the prior art is affected by objective factors, the quality of waterproof and cast-in-place secondary lining concrete structures varies, and the construction efficiency is low

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