Construction method of swivel continuous beam for crossing railway bridges

Abstract

The invention relates to a construction method of a swivel continuous beam when the existing railway bridges are crossed. The construction method is invented mainly to solve the existing problem that the construction method of bridge swivel can not be adopted when the distance between a pier body and the existing slope toe of the railway is short. The scheme adopted is that a center bearing rotates and a balanced supporting lug keeps stable as supplementary. The center bearing is taken as the swivel system and a swiveling system is arranged between the upper and lower cushion caps; a jack on both sides of a upper turntable is taken as a traction jack, another two jacks are arranged as start and boost jacks; a traction reaction base is arranged on the lower cushion cap, and the traction cable is placed on the concrete tray at the bottom of the upper cushion cap; after the completion of the box beam construction, the traction system is started, the overall formed by the upper cushion cap, pier body and box beam rotates around a hinge pin located in the center of the spherical hinge to get an angle, when the overall arrives at the location, the concrete is used for filling the gap between the upper and lower cushion caps for sealing and fixing the turntable, then the closure section is constructed. The advantage of the construction method of swivel continuous beam for crossing railway bridges is that it can be applied to the continuous box beam's construction when the distance between the pier body and the existing slope toe of the railway is short.

Description

[0001] Technical field: [0002] The invention relates to a construction method of a swivel continuous beam when spanning an existing railway bridge. [0003] Background technique: [0004] At present, when constructing across the existing railway bridge, in order to ensure safety and not affect the construction of the existing railway bridge, it is necessary to adopt the construction method of beam body rotation, then use the railway skylight to rotate and close, and finally use brackets and hanging baskets to pour and close section, contact the anchoring system, and complete the system conversion. However, when the distance between the pier body and the slope toe of the existing railway is small, the beam body rotation method cannot be used for construction. [0005] Invention content: [0006] The technical problem to be solved by the present invention is to provide a continuous girder construction method for the swivel body of a cross-railway bridge suitable for a small d...

AI Technical Summary

Problems solved by technology

However, when the distance between the pier body and the slope foot of the existing railway is small, the beam body rotation method cannot be used for construction.