Subway station reserved underpass structure system and construction method thereof

Abstract

The invention provides a subway station reserved underpass structure system and a construction method thereof. The subway station reserved underpass structure system comprises a subway station foundation pit and foundation pit supporting structures located on the two sides of the subway station foundation pit, and the subway station foundation pit comprises a pre-built subway station structure and a reserved underpass structure located below the pre-built subway station structure; the pre-built subway station structure comprises a top wall, a bottom plate, structural columns and side walls; the reserved underpass structure comprises a foundation reinforcing area, supporting piles and a ground beam; the whole reserved underpass structure is filled with the foundation reinforcing area, and a later interval tunnel is arranged in the foundation reinforcing area; the supporting piles correspond to the structural columns and the side walls of the pre-built subway station structure in the vertical direction and are downwards inserted into the foundation reinforcing area; and the ground beam connects the supporting piles with one another at the top ends of the supporting piles, so that the ground beam and the supporting piles integrally form a frame structure.

Description

technical field [0001] The invention belongs to the field of subway engineering structures, and in particular relates to a reserved under-pass structure system of a subway station and a construction method thereof. Background technique [0002] With the rapid development of domestic urban rail transit construction, there are more and more new subway lines that need to pass through the first-built (that is, existing) lines, especially at the crossroads of the main roads in the city, there will be new construction Intersection tunnels or subway stations cross under the problem of building subway stations first. [0003] In most cases, due to the variability of traffic planning, the planning and design of the first-built line usually does not consider the construction of the later under-passing line, so no reservation conditions are set, and this type of crossing project is the most difficult and has high safety risks. The underpass construction process is complex and the cons...

AI Technical Summary

Problems solved by technology

And because the operation of urban subways has strict control standards for the deformation of track structures, and the underpass construction of new subway lines will inevitably cause disturbances to the pre-built structures, so it is difficult to ensure the operation of the first-built subway stations at the same time during the underpass construction process using current technology Safety and construction safety of new lines, this has become a problem that must be solved for this type of project

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