Bridge sliding clamping plate hook lock type box girder overturning prevention mechanism

Abstract

The invention discloses a bridge sliding clamping plate hook lock type box girder overturning prevention mechanism and a construction method thereof. The bridge sliding clamping plate hook lock type box girder overturning prevention mechanism comprises a box girder and a capping beam. The box girder is characterized in that a U-shaped box girder sliding clamping plate hook lock assembly is arranged on the bottom face of the box girder in an anchoring mode. The capping beam is characterized in that a capping beam sliding clamping plate hook lock assembly is anchored on the side face of the capping beam. The two assemblies are locked in a sliding mode, and additional stress generated by the box girder and a bridge pier due to stretching of the box girder is removed. When the box girder has an overturning trend, the two assemblies are assembled together in a hook lock mode, and thus the box girder can be prevented from overturning. After the mechanism is mounted on a continuous box girder bridge, the overturning problem of the box girder can be solved. The bridge sliding clamping plate hook lock type box girder overturning prevention mechanism has the advantages that the structure is simple and reasonable, main beam stretching is released, a support can be replaced conveniently, the usability is good, and manufacturing cost is low. The mechanism can be machined (welding or casting) in a factory in a concentrated mode, and the construction period is shortened. Huge investment is saved for China, remarkable economic benefits are obtained, meanwhile, huge social benefits are achieved, and the negative effect of bridge overturning on the society is removed.

Description

technical field [0001] The invention relates to an anti-overturning mechanism of a single-pillar pier bridge. Specifically, the utility model relates to a bridge sliding card plate hook lock type anti-box girder overturning mechanism and a construction method. Background technique [0002] As the substructure of continuous girder bridges, single-column piers reduce the space occupied by bridges, and are widely used as urban overpasses, ramp bridges and flyovers of high-grade highways. However, in recent years, major vicious accidents of the main girder overturning have occurred continuously due to the side pier bearings falling out of space on this type of bridge. Such as Jinwen Highway Interchange D Ramp Bridge, Baotou Minzu East Road Viaduct, Tianjin Gangtang Interchange A Ramp Bridge, Shangyu Chunhui Overpass, Harbin Third Ring Road Qunli Viaduct Honghu Road Upramp Bridge. It can be seen from the above accidents that the cause of such accidents is not the proble...

AI Technical Summary

Problems solved by technology

This mechanism integrates the box girder and side pier cover girder hook lock together, provides the bridge with an anti-box girder overturning moment, avoids the support of the side pier, and solves the problem of lateral overturning stability of this type of bridge

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