Steel truss girder all-welded joist slice and construction method thereof

Abstract

The invention relates to a steel truss girder all-welded joist slice and a construction method of the steel truss girder all-welded joist slice. A top chord rod is welded at two ends of two top chord whole nodes and the middle of the two top chord whole nodes to form a whole top chord rod, a lower chord rod is welded at two ends of two lower chord whole nodes and the middle of the two lower chord whole nodes to form a whole lower chord rod, and the upper end and the lower end of a diagonal and the upper end and the lower end of a montant are respectively welded with the whole nodes of the whole top chord rod and the whole nodes of the whole lower chord rod. The construction method includes that two intermodes of the top chord is constructed as a whole top chord rod, two inermodes of the lower chord is constructed as a whole lower chord rod, and the montant and the diagonal in two intermodes are connected with the whole nodes of the whole top chord rod and the whole lower chord rod in a welding mode. The steel truss girder all-welded joist slice has the advantages of being capable of reducing splicing of construction plants and workload of welding, being high in working efficiency and rapid in construction schedule, guaranteeing quality, saving materials due to the reduction of the splicing of a segment of a main truss, reducing a lateral construction plant weld joint of a deck slab and slicing of a longitudinal rib, and being high in work efficiency. The steel truss girder all-welded joist slice is capable of being used for steel truss girders of bridges such as a simple support steel truss girder, a consecutive steel truss girder and a steel truss girder cable-stayed bridge in roads and railways.

Description

technical field [0001] The invention relates to a novel all-welded steel truss girder and a construction method thereof. Background technique [0002] In recent decades, with the rapid development of my country's social economy, the requirements for the performance of bridges are getting higher and higher. Steel truss girder bridges for road and railway have the advantages of large span, light weight, and high bearing capacity, and have become the first choice for cross-river and sea-crossing bridges. The following problems are often encountered in the design of this type of bridge: the erection of traditional steel truss girders adopts the design and installation method of loose assembly, that is, the single rods are hoisted one by one to the end of the bridge deck girder by a crane, and then The beams are bolted one by one or welded little by little. The advantage of this method is that the manufacturing and installation equipment and process are simple, and conventional ...

AI Technical Summary

Problems solved by technology

The disadvantage is that workers have to screw a large number of high-strength bolts on site to meet the structural connection strength requirements, and the number of welds on the site is large

The construction progress is slow due to the poor working environment and high work intensity of the workers above the water

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