Large-span continuous girder-span existing station rotation and closing construction method

Abstract

The invention discloses a swivel and closure construction method for a large-span continuous beam crossing an existing station. A constructed large-span continuous beam adopts a reinforced concrete box beam crossing the existing station and the front end and the rear end of a span are supported on a second buttress and a third buttress respectively; the swivel and closure construction process comprises steps as follows: step one, swivel system construction: a swivel system is constructed at the bottom of each of the second buttress and the third buttress and comprises a lower support disc, an upper rotating disc, a bridge swivel spherical hinge and a swivel traction system, multiple support legs are arranged at the bottom of the upper rotating disc, and an annular slide way allowing the support legs to slide is formed on a lower bearing platform; step two, construction of the second buttress and the third buttress; step three, construction of a front side beam body and a rear side beam body; step four, plane swivel construction; step five, side span closure construction; step six, mid-span closure construction. According to the method, the steps are simple, the design is reasonable, the construction is simple and convenient, the use effect is good, the swivel and closure construction process of the large-span continuous beam crossing the existing station can be completed simply, conveniently and rapidly, and the construction process is safe.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a large-span continuous girder-span existing station swivel and construction method. Background technique [0002] At present, China's railway construction is in a golden period, and a large number of passenger dedicated lines and intercity railways have started and put into use one after another. The special technical requirements of passenger dedicated lines make it impossible to use level crossings like ordinary railways. What followed was an increase in the construction of the passenger dedicated line across the existing main railway lines, railway stations, and highways. The construction period for crossing is long, which has a great impact on the operation of the business line and highlights potential safety hazards. [0003] The bridge swivel construction is to use the ball joint with a small friction coefficient, the slideway and the turntable str...

AI Technical Summary

Problems solved by technology

However, the station has a large swivel span, heavy girders, high risk, tight construction period, and difficult construction

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