Construction method for implementing transfer between platform floor of existing subway station and platform floor of new subway station

Abstract

The invention relates to a construction method for implementing transfer between a platform floor of the existing subway station and a platform floor of a new subway station. The construction method comprises the following steps of constructing the platform floor of the new subway station to a pedestrian path below a structural bottom plate of the existing subway station; reinforcing strata surrounding the pedestrian path; dividing a structural bottom plate longitudinal beam of a passageway which is arranged at a position of a table board of the existing subway station and is connected to the pedestrian path into a left portion and a right portion; respectively constructing the left portion and the right portion; correspondingly constructing surrounding rock of an excavation structure at a position of a structural bottom plate longitudinal beam on a side wall of a constructed pedestrian passage structure; breaking down a waterproof layer, a reinforcement cover, construction preliminary bracings and cross braces, a construction waterproof layer and assembling reinforcements on a structural bottom plate portion of a platform of the existing subway station; connecting a new structure and the existing structure by using embedded steel bars; pouring side walls and middle walls; constructing another structural bottom plate longitudinal beam to obtain a complete passageway structure; finishing construction of the passageway of the pedestrian path; and connecting the platform floor of the existing subway station to the platform floor of the new subway station. A construction process is safe, the practicability is high, and normal operation of the existing subway lines is not affected.

Description

technical field [0001] The invention belongs to the technical field of subway station design and construction, and in particular relates to a construction method for transferring between an existing subway station and a newly built subway station platform. Background technique [0002] The purpose of building a rail transit network is to ensure the smooth and fast travel of citizens, and to provide passengers with a safe, convenient and comfortable environment. With the continuous expansion of the urban rail transit network, the status of the transfer station is becoming more and more prominent, becoming the main factor affecting the efficiency and service level of rail transit. [0003] When a new station needs to transfer to an existing station, there are usually two transfer conditions, that is, platform transfer and station hall transfer. The construction of the transfer method at the station hall level is simple and has little impact on the safety of subway operation, ...

AI Technical Summary

Problems solved by technology

The construction of the transfer method at the station hall level is simple and has little impact on the safety of subway operation, but the transfer distance is long, the transfer time is long, and the service level is low; while the platform transfer can effectively shorten the transfer distance, reduce the transfer time, and improve Service level, but because the existing stations have been built for a long time, usually no transfer conditions are reserved

There are the following risks in the use of platform transfers: (1) breaking the structural floor of the existing station will have a great impact on the operation of the subway, (2) it may change the stress mode of the existing station structure, (3) excavating a new station under the floor of the existing station space could jeopardize subway safety operations

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