Connection structure and construction method of multi-span simply-supported bridge expansion joint

Abstract

The invention discloses a connection structure of a multi-span simply-supported bridge expansion joint. A bridge includes a pier, a cover beam and support bases. The connection structure includes a first steel block, anchor bolts, a fixing nut, a supporting steel plate, two L-shaped rubber pad blocks and multiple sets of fastening mechanisms. The first steel block comprises a flat steel plate anda channel steel fixedly connected with the bottom surface of the flat steel plate, and the flat steel plate is provided with through holes corresponding to the anchor bolts; a plurality of second steel blocks used for buffering and supporting are embedded into each L-shaped rubber pad block and selected from at least three of a spherical steel block, a cylindrical steel block, a triangular steel block, a cuboid steel block, a prismatic steel block, a pyramidal steel block and a circular steel block; each set of fastening mechanism includes concrete anchor blocks and prestressed steel bars. A mode of combination of rigid connection and flexible connection is adopted, not only can the requirements of using strength be met, but also the effect of elastic damping and buffering is achieved, thenoise is reduced at the same time, and a construction method of the multi-span simply-supported bridge expansion joint is economical, fast and easy to popularize.

Description

technical field [0001] The invention relates to the field of bridge engineering technology and construction technology, in particular to a connection structure of a multi-span simply supported girder bridge and a construction method thereof. Background technique [0002] Bridge expansion joints are used to meet the deformation requirements of the bridge deck. Expansion joints are usually provided between the two girder ends, between the girder end and the abutment, or at the hinged position of the bridge. It is required that the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the bridge axis, and are firm and reliable. The vehicles should run smoothly without sudden jumps and noises; they should be able to prevent rainwater and garbage from infiltrating and blocking; installation, inspection, and maintenance 1. The removal of dirt should be simple and convenient. At the place where the expansion joint is set, the railing and...

AI Technical Summary

Problems solved by technology

[0005] (1) During use, especially when large trucks pass by, the rubber pads between the main girders have limited load-bearing capacity due to the large gap between the main girders, and cannot effectively absorb energy. Beams are prone to collapse and there are potential risks;

[0006] (2) Enlarging the size of the cover beam is only a passive way to prevent falling beams, and has no shock-absorbing and buffering effect

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