Prefabricated rectangular steel tube concrete composite truss bridge and its construction method

Abstract

The invention discloses an assembled rectangular steel pipe concrete composite truss bridge and a construction method thereof. The truss bridge comprises a bridge lower support structure, an assembled main girder and a prefabricated bridge deck connected to the assembled main girder through shear keys. The main girder is a rectangular steel tube concrete composite truss and it is assembled by multiple longitudinal trusses. The longitudinal truss is composed of upper chord, lower chord and web. The cross-bridge support structure composed of diagonal braces, the rectangular steel tube concrete composite truss is assembled from multiple truss segments; the construction method includes steps: 1. Construction of the lower support structure of the bridge; 2. Assembly and erection of the prefabricated main girder; 3. , Prefabricated bridge deck installation. The invention is reasonable in design, easy in construction and good in use effect, can give full play to the advantages of the combination of steel and concrete materials, has good mechanical performance, fast construction speed and low cost, and can realize standardized and batch production of main girders and bridge decks.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to an assembled rectangular steel pipe concrete composite truss bridge and a construction method. Background technique [0002] In the construction process of traditional steel-concrete structure bridges, there are disadvantages such as high material transportation costs, long construction period, difficulty in ensuring the quality of on-site concrete pouring, and poor use effect of the constructed bridges. Low efficiency, the construction process is easily subject to environmental constraints and many other problems, and it is also not conducive to the rapid erection of construction bridges in emergency situations such as road repairs. Therefore, it is necessary to design a composite structure of steel pipe concrete trusses as the load-bearing structure of the bridge to reduce the cost of material transportation and reduce the self-weight of the bridge. At the same time...

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Problems solved by technology

[0002] In the construction process of traditional steel-concrete structure bridges, there are disadvantages such as high material transportation costs, long construction period, difficulty in ensuring the quality of on-site concrete pouring, and poor use effect of the constructed bridges. Low efficiency, the construction process is easily subject to environmental constraints, and many other problems, and it is also not conducive to the rapid erection of construction bridges in emergency situations such as road repairs

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