Secondary lining integral formworking construction method for tunnel with super-large cross section

Abstract

The invention belongs to the technical field of construction engineering and provides a secondary lining integral formworking construction method for a tunnel with a super-large cross section. The method includes a main line which includes bogie designing and manufacturing, track laying, assembling and adjusting, bogie front and back position adjusting and locking, plug formwork erecting, formwork center line elevation adjusting, concrete pouring, curing, formwork removing and next formwork constructing; in the main line, surveying and setting out, waterproof board laying, rebar manufacturing and mounting, rebar checking and accepting and plug formwork erecting are performed; in the main line, concrete raw material selecting, concrete mix proportion optimizing, mix proportion onsite checking, concrete agitating and concrete pouring are performed; in the main line, formwork bogie locking device checking and concrete pouring are performed; in the main line, curing and roughened joint treating are performed. By integration of specially-made assembly frame and large formwork, the integral formwork bogie is formed, and one-time pouring forming of secondary lining concrete is guaranteed.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a construction method for integral mold construction of the secondary lining of super-large-section tunnels. Background technique [0002] In recent years, with the increase of urban traffic pressure, major cities have started to build rail transit projects. The section of the underground excavation station tunnel in the city is large, the section changes a lot, and the construction is difficult. In the rail transit tunnel project, the station tunnel excavation space has a maximum height of nearly 32m, a span of nearly 24m, and a total excavation area of ​​nearly 760m 2 , and the thickness of the rock layer at the shallowest part is only 9m, and the secondary lining is a reinforced concrete structure, which makes it difficult to ensure safe and rapid construction of the project. Contents of the invention [0003] The technical task of the present invention is...

AI Technical Summary

Problems solved by technology

In the rail transit tunnel project, the station tunnel excavation space has a maximum height of nearly 32m, a span of nearly 24m, and a total excavation area of ​​nearly 760m 2 , and the thickness of the rock layer at the shallowest part is only 9m, and the second lining is a reinforced concrete structure, so it is difficult to ensure safe and rapid construction of the project

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