Construction method of inverse construction of connecting channel structure in open-cut section of subway

Abstract

The invention discloses a construction method for reverse construction of a communication channel structure in an open-cut section of a subway. The sequence includes: construction preparation, excavation of foundation pit to the bottom, main line bottom plate, main line side wall, communication channel side wall, and access line The bottom plate, the top plate of the access line, the earthwork excavation of the collecting tank, the treatment of construction joints, the bottom plate of the collecting tank, the side wall of the collecting tank, the bottom plate of the communication channel, the cover plate of the pool, the fire door, and the waterproof casing. The construction characteristics of the construction method are: The side walls of the connection channel are constructed first, and then the bottom plate of the connection channel is constructed. Different from the traditional open-cut process, the foundation pit structure is stabilized due to the early construction of the side walls of the connection channel, while the excavation and structural construction of the collecting tank at the connection channel are arranged at a later stage. Interspersed with the track laying operation, it becomes a non-critical line, which effectively ensures the smooth completion of the construction node and saves a certain amount of time for the subway construction project.

Description

technical field [0001] The invention belongs to the technical field of urban rail transit, and in particular relates to a construction method for inverse construction of a connecting channel structure in an open-cut section of a subway. Background technique [0002] With the rapid development of urban rail transit, open-cut construction has been increasingly used in many suburban areas. When excavating sand and gravel layers, the foundation pit cannot be formed due to the influence of groundwater, and the construction efficiency is low. When excavating near the protective structure, the back of the pile body is hollowed out due to groundwater scouring, which will cause great safety hazards. When the entrance and exit lines of the cut-and-cover section (including the entry and exit lines) are located in the middle and upper span of the main line section for transition, an isolated island is formed at the position of the communication channel, and the structure is located in t...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a reverse construction method for the communication channel structure in the open excavation section of the subway. The safety risk is relatively high, the cost of groundwater treatment by traditional construction methods is high, and the construction nodes are difficult to guarantee, etc.

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