Plate beam jacking support mechanism, plate beam jacking support tooling

Abstract

The invention relates to a plate-girder jacking support mechanism and a plate-girder jacking support tool. The plate-girder jacking support mechanism comprises a threaded reinforcing steel pair, a bolt pair, a bracket and angle steel, wherein the bracket and the angle steel are arranged on the two sides of a cover beam oppositely. The angle steel penetrates through the threaded reinforcing steel pair to be fixed to the back of the side surface of the cover beam and is connected and fixed to the bracket through the bolt pair. When a jack arranged on the bracket jacks a plate girder, the load of the plate girder is transmitted to the cover beam through the bracket, the angle steel and the threaded reinforcing steel pair in sequence. Compared with the prior art, according to the plate-girder jacking support mechanism and the plate-girder jacking support tool, the requirements for personnel and techniques are low; due to the fact that similar components can be interchanged, the cost of construction materials is further reduced, and using is convenient; in addition, the total weight of the bracket, the angle steel, a connecting pair and the jack can be omitted relative to the self weight of the plate girder, so that the difference between the load borne by the cover beam in jacking and the load transmitted by the structure under the dead load condition through a bridge bearing is not large; moreover, the cover beam cannot be damaged when a force transferring route is changed.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a plate girder jacking support mechanism and a plate girder jacking support tool. Background technique [0002] As of the end of 2014, more than 500,000 highway bridges have been built in my country, more than half of which are simply supported hollow slab bridges with a span of less than 30m. Correspondingly, bridge bearings of the same scale are also placed on these hollow slab structures. However, since the service life of the plate rubber bearings used in hollow slab girder bridges is usually less than 15 years, which is much lower than the 100-year design service life of the bridge, the hollow slab girder bridge needs to be replaced many times during its service life. [0003] When replacing the supports, the hollow slab girders can be hoisted one by one and the supports replaced one by one; the entire bridge deck can also be lifted uniformly and then the supports can be r...

AI Technical Summary

Problems solved by technology

However, since the service life of the plate rubber bearings used in hollow slab girder bridges is usually less than 15 years, which is much lower than the 100-year design service life of the bridge, the hollow slab girder bridge needs to be replaced many times during its service life.

However, due to the large difference in the shape of the bridge piers, the processing of steel hoops is difficult, there are few opportunities for reuse, and the construction investment is relatively large

Images