A long-span steel box girder stiffness coordinated composite deck pavement structure and its construction method

Abstract

The present invention relates to a large-span steel box girder rigidity coordination type composite bridge deck pavement layer structure and a construction method thereof. The construction method comprises painting anticorrosion thermal insulation layer coating along the periphery of a steel box girder; setting a side surface connecting plate and a top overlapping plate at seaming positions of the steel box girder, longitudinally welding shearing-resistant strips at an upper surface of the box girder, setting a shearing-resistant strip binding bar between the adjacent shearing-resistant strips, and setting a horizontal negative moment reinforcement and a longitudinal negative moment reinforcement at a bridge pier position; erecting a template to perform concrete pouring and maintenance of a rigid reinforcement layer; successively constructing a reinforcement mesh layer, a waterproof layer and a stress absorbing layer after intensity of the concrete is formed, and laying a drainage strip in a road camber direction; and finally laying a fine-grained SMA asphalt concrete layer and a medium-grained SMA asphalt concrete layer. Deformation and rigidity coordination of an upper structure layer of the steel box girder can be achieved, the steel box girder can also be effectively prevented from being influenced by pavement water seepage and temperature gradient, and the influence of the negative moment at the bridge pier on the structure can also be reduced.

Description

technical field [0001] The invention belongs to the technical field of bridge construction engineering, relates to a steel box girder deck pavement construction method, in particular to a large-span steel box girder rigidity which can realize rigidity coordination between pavement structure layers and improve structural layer disease resistance The coordinated composite bridge deck pavement structure and its construction method are suitable for the bridge deck pavement construction project of long-span steel box girder bridges. Background technique [0002] With the rapid development of the economy, the application of steel bridges in long-span bridges and urban overpasses is becoming more and more common. Compared with steel bridges such as steel trusses and steel arch bridges, steel box girders have the advantages of light weight, economy, convenient erection, and large spanning capacity, and their engineering applications are more common. The bridge deck pavement is an i...

AI Technical Summary

Problems solved by technology

The structure adopts GFRP-composite concrete blast-resistant pavement, and uses high-strength, high-toughness lightweight composite concrete, which can greatly enhance the strength, toughness, and impact and blast resistance of the steel box girder pavement. However, it is difficult to achieve pavement for this structure The stiffness coordination between the structural layers cannot effectively reduce the damage of the vehicle shear force to the overlay structure

[0005] To sum up, it is common to pave asphalt concrete layer on the steel box girder bridge deck. Although the existing overlay structure has achieved good engineering application results under suitable working conditions, how to effectively coordinate the overlay structure layer There are still room for improvement in terms of stiffness, control of shear stress, and prevention and control of structural water damage.

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