Anti-knocking steel box beam bridge deck paving structure and paving method

Abstract

The invention provides an anti-knocking steel box beam bridge deck paving structure and a paving method and belongs to the technical field of traffic transportation and the field of protection of bridge engineering. In the structure, the upper layer is an asphalt concrete wearing layer and the lower layer is a GFRP (Glass Fiber Reinforced Polymer)-composite concrete anti-knocking pavement layer, namely, a waterproof layer (2) is arranged on a steel box beam orthotropic bridge deck slab (1); a lower adhesive layer (3) is arranged on the waterproof layer (2); the GFRP-composite concrete anti-knocking pavement layer (4) is arranged on the lower adhesive layer (3); an upper adhesive layer (5) is arranged on the GFRP-composite concrete anti-knocking pavement layer (4); the asphalt concrete wearing layer (6) is arranged on the upper adhesive layer (5). The paving method comprises the following steps: (a) derusting a steel bridge deck by sandblasting; (b) performing anticorrosive coating on the steel bridge deck slab, and arranging the waterproof layer in a sprinkling way; (c) forming the lower adhesive layer on the waterproof layer in a coating mode; (d) strapping a GFRP glass fiber reinforced bar net, and then pouring high-strength high-toughness light composite concrete; (e) carrying out vibrating and maintaining, and afterwards adhering a GFRP glass fiber reinforced sheet on the upper surface of the concrete layer; (f) laying coarse sand on a contact surface between the GFRP sheet and the asphalt pavement layer, and arranging the upper adhesive layer in a sprinkling way; and (g) laying the asphalt concrete wearing layer.

Description

Technical field [0001] The invention relates to a steel box girder bridge deck paving layer structure and a paving method, in particular to a steel box girder bridge deck paving layer structure with anti-explosion performance and a paving method, belonging to the technical field of transportation and bridge engineering Protection field. Background technique [0002] Bridge structures, especially urban viaducts, overpasses, and sea-crossing bridges, are open public transportation facilities. During their service, there are large explosions of dangerous goods transport vehicles or terrorists detonating car bombs or luggage bombs above the bridge deck. Risk of damage and mass casualties. In the bridge structure, the most common one is the steel box girder structure, which is composed of orthotropic steel bridge decks, stiffeners, transverse partitions, and longitudinal partitions. The steel bridge deck is thin in thickness and low in rigidity. The general bridge deck pavement stru...

AI Technical Summary

Problems solved by technology

The thickness of the steel bridge deck is thin and the stiffness is small. The general bridge deck pavement structure generally only considers the concentrated load of the scattered wheels to protect the bridge deck, and it does not have the effect of resisting explosion impact. When encountering an explosion impact load, the orthotropic steel bridge deck Large plastic deformation may occur, even cracks or breaches may occur, resulting in partial damage or overall collapse of the bridge structure

At present, the existing bridge codes have not considered the impact of explosions. The research on the anti-explosion of bridge structures is more concentrated on the damage to the pier under the bridge or the damage to the overall bridge structure. In order to reduce the damage and destruction of the steel box girder structure, especially the steel bridge deck under the blast load above, a steel box girder bridge deck pavement structure with blast resistance is proposed, through this pavement structure Reducing the damage effect of explosion impact load on the substructure

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