Assembly type rectangular concrete-filled steel tube composite truss girder bridge and construction method thereof

Abstract

The invention discloses an assembly type rectangular concrete-filled steel tube composite truss girder bridge and a construction method thereof. The truss girder bridge comprises girder lower supporting structures, an assembly type girder and a prefabricated bridge panel which is connected with the assembly type girder through a shear key. The assembly girder is a rectangular concrete-filled steel tube composite truss and is formed by splicing a plurality of longitudinal trusses. Each longitudinal truss is composed of an upper chord member, a lower chord member and a web member. A horizontal bridge direction supporting structure composed of two inclined struts arranged in a crossed mode is arranged over each girder lower supporting structure, and the rectangular concrete-filled steel tube composite truss is formed by assembling a plurality of truss sections. The construction method comprises the first step of construction of the girder lower supporting structures, the second step of erecting of the assembly type girder, and the third step of mounting of the prefabricated bridge panel. The assembly type rectangular concrete-filled steel tube composite truss girder bridge is reasonable in design, easy and convenient to construct, good in using effect, capable of fully performing the advantage of the combination of steel and concrete materials, good in stress performance, high in construction speed, low in construction cost, capable of achieving the standard and batch production of the girder and the bridge panel.

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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