Compound expansion joint

Abstract

The invention relates a bridge extension connector, comprising a first pin component arranged on the edge of a first top structure to alternatively form pins and pin grooves to a second top structure, a first pin supporting piece for fixedly supporting the first pin component on the first top structure, a second pin component opposite to the first one, a second pin supporting piece, a third pin component alternatively formed between the first and second pin components, a middle rail arranged between the first and second supporting pieces, a middle rail supporting piece arranged at the first and second top structures, supporting the middle rail, and allowing the extension of the first and second top structures, and a rail space keeper.

Description

technical field [0001] The present invention relates to a bridge expansion joint arranged between an elevated highway or a bridge superstructure and the superstructure, in particular to a composite expansion joint (Complex expansion joint). Background technique [0002] Generally, the superstructure of a bridge expands or contracts due to temperature changes or the like. In this regard, when constructing a bridge, an appropriate spacing (commonly referred to as "a gap") is placed between two adjacent superstructures. An expansion joint is provided between such superstructures and superstructures. [0003] Expansion joints for bridges are broadly classified into rail type expansion joints and finger type expansion joints. [0004] Rail type expansion joints can be used on bridges with large expansion and contraction by increasing the number of intermediate rails according to the increase in expansion and contraction of the bridge superstructure with 80mm as the maximum spac...

AI Technical Summary

Problems solved by technology

In this regard, the substructure supporting its rails to keep the distance between the rails is complex and the work efficiency during construction is low. When excessive impact is added to the rails, the durability is weak and loud noises are generated.

[0006] The pin type expansion joint has a simple structure, disperses the impact on the upper part, has good durability and does not generate loud noise, but only the ends of the two upper structures whose structures are opposed to each other are supported, and the amount of expansion and contraction is more than 400mm. Difficult to apply

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