Concrete bridge deck composite structure bridge and construction method thereof

Abstract

The invention relates to the technical field of bridge construction, in particular to a concrete bridge deck composite structure bridge and a construction method thereof. The steel bridge deck is adopted for the lower-layer railway bridge deck, and the prestressed concrete bridge deck is adopted for the upper-layer highway bridge deck, so that the technical problems that the steel bridge deck adopted for the upper-layer bridge deck is poor in economy and prone to fatigue failure are solved. The concrete bridge deck slabs are prefabricated and cast-in-place in a combined mode, most bridge deck slabs are prefabricated in a blocking mode, the quality of the concrete bridge deck slabs is guaranteed, after the bridge deck slabs are hoisted in place, cast-in-place connection between the bridge deck slabs and between the bridge deck slabs and a steel structure is conducted, the transportation and installation construction difficulty of the bridge deck slabs can be reduced, construction is convenient, and the construction efficiency is improved, and construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a concrete bridge deck composite structure bridge and a construction method thereof. Background technique [0002] At present, large-scale steel truss girder bridge projects at home and abroad, such as Wuhan Tianxingzhou Yangtze River Bridge, Nanjing Dashengguan Yangtze River Bridge, and Jinan Yellow River Bridge, mostly use conventional steel truss girder structures. Road-rail bridges mostly use double-layer steel decks. The double-layer steel bridge deck has many shortcomings, such as the large amount of steel used for the double-layer steel bridge deck; the single-layer asphalt pavement is generally used when the upper layer adopts the steel bridge deck. When the steel bridge deck is exposed to sunlight, the structure is not uniformly heated, and the deformation is large; when the reinforced concrete bridge deck is used for the upper layer, a steel truss joint bea...

AI Technical Summary

Problems solved by technology

Double-layer steel decks have many disadvantages. For example, the amount of steel used for double-layer steel decks is relatively large; when the upper deck is made of steel decks, a single-layer asphalt pavement is generally used. Because the pavement layer is thin and steel is sensitive to temperature, the double-layer steel deck When the steel bridge deck is exposed to sunlight, the structure will be heated unevenly and the deformation will be large; when the reinforced concrete deck is used on the upper floor, a steel truss bonded beam will be formed, the stiffness will increase, and the amount of steel will decrease, but the negative bending moment area of ​​the fulcrum will be subject to greater tension and resistance. Crack performance is weak, prone to local cracking

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