Highway-railway combined construction steel web member double-combination continuous trussed beam and construction method thereof

Abstract

The invention provides a highway-railway combined construction steel web member double-combination continuous trussed beam. The highway-railway combined construction steel web member double-combination continuous trussed beam comprises an upper-layer highway concrete bridge deck slab, a lower-layer railway concrete bridge deck slab and steel web members. Upper-layer highway concrete longitudinal beams are arranged on the two sides of the upper-layer highway concrete bridge deck slab in the transverse direction of a bridge, lower-layer railway concrete longitudinal beams are arranged on the twosides of the lower-layer railway concrete bridge deck slab in the transverse direction of the bridge, and the upper ends and the lower ends of the steel web members are connected with the upper-layerhighway concrete longitudinal beams and the lower-layer railway concrete longitudinal beams on the same side through gusset plates. In addition, the invention further provides a construction method of the bridge. According to the highway-railway combined construction steel web member double-combination continuous trussed beam, a double-combination structural form that the steel web members are combined with the upper-layer bridge deck and the lower-layer bridge deck is adopted; the bridge is clear in stress, high in rigidity, high in integrity, small in maintenance workload, good in economical efficiency, capable of optimizing structural stress and engineering design, capable of being widely applied to highway-railway combined construction bridges of high-speed railways, attractive in structure and high in competitiveness, and the material performance of steel and concrete is fully utilized.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a double-combined continuous truss girder with steel webs for road-rail construction and a construction method thereof. Background technique [0002] At present, steel truss girders are mainly used for bridges built together at home and abroad, but this structural form has the following disadvantages: 1. Large steel consumption and poor economic benefits; 2. There are problems such as corrosion and fatigue in the steel structure bridge deck system. High maintenance and repair costs; 3. In order to meet the rigidity requirements of railway traffic, the height of the truss needs to be increased, which is often limited by the connection conditions of roads and railways or by existing buildings; 4. The number and types of steel truss girder members are various, and the construction is difficult . Contents of the invention [0003] The object of the present i...

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Problems solved by technology

[0002] At present, steel truss girders are mainly used for bridges built together at home and abroad, but this structural form has the following disadvantages: 1. Large steel consumption and poor economic benefits; 2. There are problems such as corrosion and fatigue in the steel structure bridge deck system. High maintenance and repair costs; 3. In order to meet the rigidity requirements of railway traffic, it is necessary to increase the height of the truss, which is often limited by the connection conditions of roads and railways or by existing buildings; 4. The number and types of steel truss girder members are various, and the construction is difficult

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