Chain type seamless bridge expansion device

Abstract

An extension apparatus of a seamless bridge comprises a half-beam (1) and a chain (2). A remote beam end of the chain (2) is connected to a remote beam end of the opposite half-beam (1). The chain (2) is supported by means of a groove on a side surface of an adjacent half-beam (1), and is bent and extended when a bridge is bent and extended. An upper surface of the chain (2) is approximately parallel and level to a surface of the bridge. The extension apparatus of the seamless bridge can fill a pit between half-beams as the bridge is bent and extended, and reduce vibration of a vehicle.

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...

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