Chained seamless bridge extension device

Abstract

The invention discloses a large-displacement seamless bridge extension device capable of improving the evenness of a bridge floor. The extension device solves the problem that concave pits exist on the surface of the bridge extension device by filling an extension space of the bridge extension device with chains (referred to as 'chain jointing'). The upper surface of each chain is parallel and level to the bridge floor basically; a far beam end of each chain is connected with a far beam end of each opposite half beam, and bends and stretches along with the bridge extension; and the chains are supported by grooves on the sides of the adjacent half beams. The extension device is simple in structure, and convenient and practical, and can level up the concave pits without affecting composite deflection of the bridge extension device, so that the vibration problems of the extension device and vehicles are solved basically, the seamless dream of people is achieved, and the last meter of a long bridge becomes level at last.

Description

technical field [0001] The invention relates to a large-displacement bridge expansion device capable of improving the smoothness of the bridge surface. The expansion device has extremely small gaps, stable driving, no vibration and no noise. Background technique [0002] The modular bridge expansion device dominates by "changing large gaps into small gaps", and the comb-tooth bridge expansion device has unlimited scenery through "transverse gaps into vertical gaps". There is no best, only better. "Small seams" can only meet the basic requirements, and "seamless" is the highest state. Although there are seamless expansion devices made of modified asphalt and elastomers in the industry, they are only suitable for small displacement bridges. [0003] For the convenience of description, four concepts are introduced: telescopic space refers to the space (pit) reserved for the closure of bridge telescopic devices, such as the gap between the middle beam and the middle beam in th...

AI Technical Summary

Problems solved by technology

However, by adding passive vibration-absorbing measures such as shock-absorbing bearings, it is only "to treat the head with a headache, and to treat the foot with a pain in the foot", and it can only increase the supporting parts of the telescopic device in disguise (such as the middle beam and beam of the modulus joint, the span of the comb-tooth joint, etc.) seam plate) deflection, causing greater vibration

Horizontal wedge expansion joint (patent No. 201010201643.4), large in shape, high in cost, and lack of ability to adapt to compound displacement

There is no other solution mentioned in the industry, and there is no solution to fill the expansion and contraction space through the chain

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