A method for reinforcing arch rib segments in steel structure arch bridges

Abstract

The invention discloses a method for reinforcing an arch rib segment in an arch bridge of a steel structure, and relates to the field of bridge restoration. The method comprises the following steps: a bottom plate and a middle partition plate of the arch rib segment are detached, and a top reinforcing plate, a first web flitch, a second web flitch, a third web flitch, a fourth web flitch, a first bottom plate flitch assembly and a second bottom plate flitch assembly are prefabricated; the top reinforcing plate is transversely fixed to the position between a first side plate and a second side plate, the first web flitch and the second web flitch are fixed to the two opposite sides of the middle partition plate respectively, the first web flitch is connected with the first side plate, and the second web flitch is connected with the second side plate; the third web flitch is fixed to an inner wall of the first side plate, and the fourth web flitch is fixed to an inner wall of the second side plate; the first bottom plate flitch assembly and the second bottom plate flitch assembly are arranged on the two opposite sides of the bottom of the bottom plate respectively. The method can be used for restoration of a historical relic of bridge and meet the requirement of remaining old appearances of old buildings in restoration when the historical relic of bridge is restored.

Description

technical field [0001] The invention relates to the field of bridge restoration, in particular to a method for reinforcing arch rib segments in steel structure arch bridges. Background technique [0002] The structure of the steel structure arch bridge built earlier is quite different from the existing driveway layout and design load, and it is difficult to meet the existing traffic demand. The steel structure arch bridge built earlier is in use, and its arch axis is at The continuous deviation in the lateral direction causes damage to the arch rib structure of the arch bridge, reduces the bearing capacity of the steel structure arch bridge, and shortens the service life. Therefore, it is necessary to strengthen and repair the steel structure arch bridge before it can be further used. [0003] The existing reinforcement methods are usually external prestressed reinforcement method and anchor spraying method. The external prestressing reinforcement method usually arranges s...

AI Technical Summary

Problems solved by technology

[0005] (1) The external prestressed reinforcement method needs to install steel bars or steel wire bundles outside the beam body of the bridge, which will change the external structure of the bridge and affect the appearance of the bridge, and cannot meet the requirements of "repairing the old as old" in the cultural relic bridge. Therefore, it cannot Reinforcement of cultural relics bridges with external prestressed reinforcement method

[0006] (2) The anchor shotcrete method can only be used in bridges with concrete structures, and it is difficult to use it for reinforcement of arch ribs of steel arch bridges

Images