Connecting structure for highway bridge comb plate expansion devices

Abstract

The invention discloses a connecting structure for highway bridge comb plate expansion devices. The connecting structure comprises fixed combs and a plurality of gap crossing combs. The fixed combs are connected with fixed comb plates, the gap crossing combs are connected with a gap crossing comb plate, and the fixed combs and the gap crossing combs are arranged in a staggered insertion manner; inlaid snap-in mortise and tenon structures are arranged on adjacent perpendicular side surfaces of the fixed combs and the gap crossing combs and comprise grooves and lugs, the grooves are formed in the lower ends of the perpendicular side surfaces of the fixed combs, the lugs are arranged at the lower ends of the perpendicular side surfaces of the gap crossing combs, and the grooves are matched with the lugs. The connecting structure has the advantages that the grooves are formed in the adjacent perpendicular side surfaces of the fixed combs, the corresponding lugs are arranged on the adjacentperpendicular side surfaces of the gap crossing combs, accordingly, the gap crossing combs can assuredly freely slide in the horizontal directions, displacement load force can be transmitted, the strength and the integrity of the combs can be improved, the traffic passing smoothness can be improved, and the service life can be prolonged; upper and lower limit flexible constraint brace can be formed, the gap crossing combs can be prevented from deforming and upwardly tilting, and accordingly the traffic safety can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of a comb-tooth plate telescopic device for traffic and highway bridges, in particular to a connection structure of a highway bridge comb-tooth plate telescopic device. Background technique [0002] The expansion device of the highway bridge is one of the important components of the highway bridge structure. Its function is to make the bridge structure maintain free multi-dimensional directions under the action of factors such as temperature changes, concrete or steel shrinkage, creep displacement, and dynamic loads. It can be stretched to adapt to various deformations of the highway bridge structure, and it is an indispensable structural device to ensure the normal operation of the highway bridge. [0003] With the rapid increase of traffic and heavy vehicles, especially in recent years, the phenomenon of overloading has become more and more serious, and the damage of the expansion device of the road bridge...

AI Technical Summary

Problems solved by technology

It is difficult to balance the rigidity and flexibility of the expansion device. If the flexibility of the expansion device is increased, the driving safety of the expansion joint and the end of the highway bridge member cannot be guaranteed; position, resulting in breakage and damage to installation anchors and other components of the telescopic device

[0004] In the prior art, the expansion devices for highway bridges are generally various types of comb-tooth expansion devices, which realize their scalability by interpenetrating the butt-joint comb-tooth plates, but the vertical sides of each adjacent comb-tooth are flat, resulting in each comb-tooth being In the free end state of the cantilever beam, the comb teeth are independently deformed by force, and there is no upper and lower vertical limit restraint support between them, nor can they transfer displacement loads to each other, which is easy to fatigue and fracture, leading to serious driving safety accidents; in addition, during installation and use In the middle, the comb teeth are easy to form a suspended stress state. Under the long-term dynamic vehicle pressure, the comb teeth may be deformed and upturned, which seriously affects driving safety.

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