Construction method of bridge seamless type expansion joint

Abstract

The invention discloses a construction method of bridge seamless type expansion joint. The construction method of the bridge seamless type expansion joint includes the steps of embedding a sealing strip in the seam portion of the expansion joint, pouring melted 502 elastic-plastic bodies, placing a cross-seam aluminum sheet well, paving various high molecular polymers which fit in with the American society for testing material (ASTM) standard layer by layer, wherein the various high molecular polymers are mixed materials of the 502 elastic-plastic bodies and granite of a corresponding grade, finally using granitic plaster as a surface wearing layer, and the bridge seamless type expansion joint is achieved. The construction method of the bridge seamless type expansion joint has the advantages of satisfying stretch and displacement of an upper portion structure of the bridge, guaranteeing that cars run stably, improving riding comfort, and being strong in elastic restoring force, capable of resisting the high and low temperature, good in plasticity, extensibility, durability, waterproof performance and adhesion performance, long in service life, convenient to install, flexible in installation, rapid in traffic openness and the like. In addition, the construction method of the bridge seamless type expansion joint further has the advantage that the extensible displacement is from 20mm to 50 mm.

Description

technical field [0001] The invention relates to a construction method of road expansion joints, in particular to a construction method of bridge seamless expansion joints which is especially suitable for slab bridges or girder bridges with small spans and small displacement of expansion joints. Background technique [0002] With the acceleration of urbanization in my country, the scale of cities continues to expand, and the coverage of urban traffic has also doubled. The income of urban residents is getting higher and higher, and the number of cars is increasing year by year. People's requirements for driving comfort on roads and bridges have also increased accordingly. . For small-span slab bridges or girder bridges, the displacement of the expansion joint between the bridgehead slab and the prefabricated box girder and the cast-in-place bridge deck above the prefabricated box girder is small (horizontal displacement is less than 50mm, vertical displacement is less than 1.5m...

AI Technical Summary

Problems solved by technology

For small-span slab bridges or girder bridges, the displacement of the expansion joint between the bridgehead slab and the prefabricated box girder and the cast-in-place bridge deck above the prefabricated box girder is small (horizontal displacement is less than 50mm, vertical displacement is less than 1.5mm) , if the conventional modular expansion joints are used, the installation and positioning will be more cumbersome, and the phenomenon of jumping at the bridge head during operation is unavoidable

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