A temporary support device suitable for the conversion of long-span prestressed cap beam system

Abstract

The invention provides a temporary bearing device suitable for long-span prestressed cover beam system transformation, belonging to the field of bridge engineering. The temporary bearing device comprises an upper rotary base and a lower pin column base, wherein the upper rotary base is placed at the upper part of a semiellipsoid pin column of the lower pin column base in a matching manner via a semi-circular rotary trough which is arranged in the center of the rotary base and is provided with a downward opening to form an integrated bearing with a rotatable upper part; the semiellipsoid pin column is vertical to the direction of a cover beam and is fixedly connected between the prestressed cover beam and a concrete pier column via an upper base plate of the upper rotary base and bearing bolts of the lower pin column base respectively. The temporary bearing device has the technical effects that the cover beam can rotate relative to the lower pier column along the semiellipsoid pin column of the lower pin column base via the semi-circular rotary trough of the upper rotary base along the prestress tension direction, thus solving the problem that existing bearings can not rotate, ensuring effective application of cover beam prestress, greatly reducing the prestress loss, enabling the cover beam to be stressed more clearly and improving the construction efficiency, safety and stability of the long-span prestressed cover beam.

Description

technical field [0001] The invention relates to a temporary support device suitable for the conversion of a large-span prestressed cover beam system, which belongs to the field of bridge engineering. Background technique [0002] The double-column cap-beam structure of the prior art is widely used in highways and urban road bridges because of its simple shape and mature and convenient construction techniques. As an important load-bearing component of the lower part of the bridge, the cap beam bears the dead load of the superstructure and the live load effect transmitted to it by the main girder, and transmits these loads to the pier. However, the currently used structures all adopt the method of consolidation of the cover beam and the lower pier column. When the prestressed cap beam is used as the distance between the double columns increases, this treatment will inevitably produce the following adverse effects: [0003] (1) Due to the consolidation of the cover beam and t...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a temporary support device suitable for the conversion of long-span prestressed cap beam system, by setting a temporary support device with non-fixed connection between the upper prestressed cap Under the tension of prestress, the beam can rotate along the tension direction of prestress, so as to solve the important problem that the existing support cannot rotate, and ensure the effective application of prestress of the cover beam, so as to improve the performance of the large-span prestress cover beam. safety, stability and construction efficiency

Images