Tunnel construction method with a prefabricated elevation module

Abstract

The present disclosure relates to the technical field of tunnel construction, and discloses a tunnel construction method using a prefabricated inverted arch module. The tunnel construction method makes the connecting steel frame more tightly supported between the initial support and the prefabricated inverted arch module, and finally the fastening bolts between the connecting steel frame and the embedded sleeve are tightened again and the two Welding, connecting the fastening bolts between the steel plate and the supporting steel plate are re-tightened and the two are welded, so as to ensure the stable connection between the prefabricated inverted arch module and the initial support, and avoid the initial installation of the connecting steel frame caused by insecure installation. The support is deformed inwardly due to the surrounding rock pressure, and the application replaces the inverted arch in the traditional tunnel construction with a prefabricated inverted arch module, so that the support of the tunnel perimeter can be ensured to form a closed loop quickly, so as to avoid the deformation and settlement of the excavated section of the tunnel. , to improve the stability of the tunnel structure and construction progress.

Description

technical field [0001] The present disclosure relates to the technical field of tunnel construction, in particular to a tunnel construction method using a prefabricated inverted arch module. Background technique [0002] With the rapid development of railway construction in my country, railway construction has involved all regions of the country. During railway construction, there will be terrain restrictions. When encountering mountainous areas, tunnels need to be excavated. Tunnel construction has become an indispensable link in the process of railway construction. In actual construction, the tunnel structure usually consists of upper steps, lower steps and inverted arches. At present, the primary support, secondary lining, and backfilling of the inverted arch of the tunnel are all done by tying steel bars on site and then applying the cast-in-place concrete. This method has many construction procedures, low degree of mechanization, and difficult quality control, which is...

AI Technical Summary

Problems solved by technology

At present, the initial support, secondary lining, and backfilling of the inverted arch of the tunnel are all done by tying steel bars on site, and then cast-in-place concrete. This method has many construction procedures, a low degree of mechanization, and difficult quality control. The cast-in-place inverted arch is lagging behind in its formation and stress, which is inconsistent with the design and construction principle of "early closure" of the tunnel. It cannot effectively control the deformation and settlement of the excavated section, and it is easy to cause cracking, deformation, collapse, subsidence, and flooding of the initial support. mud accident

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