A construction method for widening and reconstructing the structure system of the existing station platform

Abstract

The invention provides a construction method of a widened and improved structure system for an existing station platform, which comprises the following steps: pre-processing steel members of a widened steel structure of a station; reinforcing frame columns of an original frame structure; reinforcing bent steel columns; mounting middle beams; mounting side beams; and mounting a structure widened platform. According to the invention, the steel members of the widened and improved part of the station are divided into middle beams, cantilever side beams and a steel structure widened platform to be respectively constructed, so that the processes are reasonable, the construction time is accurate, and the construction period is ensured; and the early subway station which can not meet the existing passenger flow is widened and improved, thereby summarizing construction experience for a new trend of the future subway industry, filling up the blank of the track traffic industry and providing reference for future improved construction.

Description

technical field [0001] The invention relates to the field of steel structure engineering construction, in particular to a construction method for widening and reconstructing a structural system of an existing station platform. Background technique [0002] With the development of the urban rail transit system, the subway sometimes lays some lines on the ground due to the factors of the construction environment, and many subway stations were established earlier, and the scale of the existing platforms can no longer meet the existing passenger flow. The line inevitably needs to be transferred with the original line. Therefore, when the transfer conditions are not reserved for the existing platform, in order to realize the dual needs of transfer and passenger flow, it is necessary to increase the passenger capacity of the existing platform itself. In addition, the existing platform needs to be widened and reconstructed. Therefore, the transformation of existing stations will b...

AI Technical Summary

Problems solved by technology

[0005] 1. The construction site is limited, and the hoisting needs to temporarily occupy the road. The construction site is narrow, and the position of the crane cannot be placed in the most favorable position for hoisting, resulting in a decrease in hoisting efficiency. At the same time, the available space for scaffolding erection and removal is very limited. After completing each step, it cannot affect the normal operation of the subway the next day and the normal traffic of the road.

[0006] 2. The construction time is limited, occupying the road surface with heavy traffic flow, and can only temporarily occupy the road at night (0:00-5:00) for construction; secondly, the transportation and installation of some components for widening and reconstruction must be carried out on the existing track During the construction process, the track must be powered off. According to past experience, the track power off time period is (0:00-3:30). In order to ensure the normal operation of the subway the next day, the preparation time before construction and the finishing time after construction are excluded. , the effective working time is only 0:30-03:30 every day

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