Reinforcing method of orthotropic steel box girder bridge deck slab

Abstract

The invention relates to a reinforcing method of an orthotropic steel box girder bridge deck slab. The reinforcing method is characterized by including the following operation steps that (1) derusting is performed; (2) a steel box girder top plate is detected; (3) an anti-corrosion layer is sprayed; (4) shear nails are welded; (5) a reinforcing mesh is mounted; (6) a high-tenacity concrete layer is poured; (7) high-temperature steam curing is performed; (8) coating with a water-proof bonding layer is performed; and (9) an asphalt layer is laid. The reinforcing method of the orthotropic steel box girder bridge deck slab is scientific and reasonable in design; the flexural rigidity of the orthotropic steel box girder bridge deck slab is improved, the stress strain of the orthotropic steel box girder bridge deck slab is effectively reduced, and the cracking risk is reduced; and the stability of the whole structure is improved, the cooperative stress of the whole structure after reinforcing is ensured, and the driving comfort and the braking performance are improved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering bridge construction, and relates to a reinforcement method for an orthotropic steel box girder deck. Background technique [0002] At present, for the construction of large-span and medium-span steel bridges in the world, the most common application is orthotropic steel bridge decks. Orthotropic steel bridge deck pavement mainly adopts double-layer SMA (asphalt mixture) pavement, poured asphalt concrete, epoxy asphalt concrete and SPS (spark plasma sintering) bridge deck pavement. Due to the lack of experience in early steel bridge construction, the characteristics of the orthotropic deck itself, and the substantial increase in traffic volume, the steel box girder orthotropic decks of many long-span bridges at home and abroad have experienced serious fatigue cracking, mainly in The orthotropic bridge deck and bridge deck pavement are very difficult to repair the bridge deck after cracki...

AI Technical Summary

Problems solved by technology

The single repair method is to repair the damage without involving structural reinforcement, and the same cracking phenomenon will still occur after a period of use; the composite repair method reduces the stiffness of the orthotropic deck by strengthening the local stiffness of the steel box girder orthotropic deck. Local stress can reduce the risk of bridge deck pavement cracking, but its own weight increases greatly, which cannot ensure the coordinated force bearing of the upper and lower layers of steel plates. Exercising the traffic function of bridge facilities

[0004] Therefore, none of the existing reinforcement methods can effectively solve the cracking phenomenon of the orthotropic rigid box girder deck, strengthen the structural stability, and at the same time ensure the overall coordinated force after reinforcement and maintenance, and improve driving comfort and braking performance.

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