Ultra-high-performance concrete reinforced hollow slab bridge structure and reinforcement method thereof

Abstract

The invention relates to an ultra-high-performance concrete reinforced hollow slab bridge structure. The ultra-high-performance concrete reinforced hollow slab bridge structure comprises hollow plate beams connected through hinge joints side by side as well as a bridge deck pavement layer above the hollow plate beams, wherein the bridge deck pavement layer comprises an ordinary concrete layer, an ultra-high-performance concrete reinforcement layer and an asphalt concrete layer; a steel reinforcement structure connected with the ordinary concrete layer is arranged in the ultra-high-performance concrete reinforcement layer. The invention further relates to a reinforcement method of the hollow slab bridge structure. The method comprises steps as follows: an original concrete layer is chiseled away; steel reinforcements are inlaid and implanted into the ordinary concrete layer, and a steel reinforcement net is paved; thin-layer ultra-high-performance concrete is poured and cured at the normal temperature, and an asphalt concrete layer is spread. Compared with the prior art, the hollow slab bridge structure and the reinforcement method have the characteristics of simple construction conditions and high construction speed, interference and influences of a conventional bridge reinforcement scheme on traffic are reduced, and better economy is realized; because of the high durability and normal-temperature curing characteristics of ultra-high-performance concrete, the service life of the hollow slab bridge structure is longer, and the curing cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of bridge reinforcement, in particular to a hollow slab girder bridge structure reinforced with ultra-high performance concrete and a reinforcement method thereof. Background technique [0002] Hollow slab girder bridge is a widely used bridge form in highway system. Due to unreasonable design and difficulty in guaranteeing construction quality, it is prone to damage of hinge joints between slabs, failure of lateral load transmission, and single slab Cases with heavy vehicle loads. [0003] Chinese patent CN 204475177 U discloses a bridge deck reinforcement pavement layer of lightweight concrete, which uses a lightweight concrete layer to replace the original concrete deck pavement layer in a hollow hinged slab bridge. Reinforcement mesh is arranged on the upper surface and the lower surface to improve the lateral stiffness and durability of the hollow hinged slab girder bridge. However, for the completed h...

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Problems solved by technology

[0002] Hollow slab girder bridge is a widely used bridge form in highway system. Due to unreasonable design and difficulty in guaranteeing construction quality, it is prone to damage of hinge joints between slabs, failure of lateral load transmission, and single slab Cases subject to heavy vehicle loads

[0003] Chinese patent CN 204475177 U discloses a bridge deck reinforcement pavement layer of lightweight concrete, which uses a lightweight concrete layer to replace the original concrete deck pavement layer in a hollow hinged slab bridge. Reinforcement mesh is arranged on the upper surface and the lower surface to improve the lateral stiffness and durability of the hollow hinged slab girder bridge. However, for the completed hollow slab girder bridge that only needs to be repaired and reinforced, it is necessary to chisel out all the concrete deck The pavement layer, especially the hard ordinary concrete layer, needs to be chiseled out, and then the new bridge surface layer is laid. General effect

[0004] In order to obtain a better reinforcement effect, ultra-high-performance concrete has been developed, but the current ultra-high-performance concrete requires high-temperature steam curing, which can eliminate excessive shrinkage and creep as much as possible during the curing stage, ensuring ultra-high performance. High-performance concrete will not produce large cracks due to shrinkage and creep during subsequent use, but its high-temperature steam curing time is long and the construction is cumbersome. Inconvenient, and the reinforced structure needs good maintenance, and the durability is difficult to guarantee

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