Railway long-span rotator T-shaped bridge construction method

Abstract

The invention discloses a railway long-span rotator T-shaped bridge construction method. The method includes: firstly, arranging a main pier foundation below a precast main pier, arranging a rotator device above the main pier foundation, precasting a T-shaped bridge along the direction parallel to an existing railway or an existing road, and pre-arranging side piers at two ends of the direction crossing the existing railway or the existing road respectively; secondly, enabling the precast T-shaped bridge to center on the main pier, and using the rotator device for planar rotation so that two ends of a bridge body 1 are in butt joint with the side piers respectively; and finally, after rotation of the T-shaped bridge, applying vertical jacking force at the bridge end positions of the two ends of the bridge body to enable the bridge ends of the two ends of the bridge body to be jacked up, and mounting supports among the bridge body and the side piers to enable the bridge body to achieve design elevation, so that construction of the T-shaped bridge is completed. The method has the advantage that rotator construction bridges are small in interference on under-bridge roads or railways. In the whole construction phase, the method almost has no interference on operation of the existing railways or the existing roads and has certain interference on operation of the existing railways or the existing roads within a short period of time during rotator construction.

Description

technical field [0001] The invention relates to the field of bridge design, in particular to a construction method for a railway large-span swivel T-structure bridge. Background technique [0002] At present, the bridge bridge schemes spanning existing railways or roads mainly include simply supported girder bridges, continuous girder bridges, continuous rigid frame bridges, and arch bridges. And jacking construction is also used, among which the cantilever pouring construction of continuous girder bridge is the most common for long-span span bridges. Among the above construction methods, prefabricated erection, swivel construction, and jacking construction have the least interference with the operation of existing railways or existing roads under the bridge, followed by cantilever pouring, and cast-in-place construction with brackets has the greatest interference. Among several construction methods that have little interference with existing lines, prefabricated erection i...

AI Technical Summary

Problems solved by technology

[0004] Although the railway long-span swivel T-frame bridge has the advantages of less interference to the operation of the existing railway or existing road under the bridge and strong spanning ability, it has no other application in the design because of its difficulty in design.

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