A top-supported multi-piece truss steel truss arch structure

Abstract

The invention discloses a deck type multiple truss steel truss arch construction. The construction comprises two internal main trusses and at least two side main trusses, each internal main truss andeach side main truss are both in an arched shape and comprise upper chord members and lower chord members, and a plurality of web members are connected the portion between each upper chord member andthe corresponding lower chord member; two internal main trusses are connected through trussing, all the side main trusses are uniformly distributed at the outer sides of the two internal main trusses,and two adjacent side main trusses, and each internal main truss and an adjacent side main truss are mutually connected. The construction is adopted, the force is simple and clear, under the circumstance of meeting same bearing capacity of existing two trusses or three trusses, the multiple truss steel truss arch construction is smaller in size and lighter in weight, the problem of arch ring member bar transportation can be solved, requirements of various transportation conditions are flexibly met, especially for bridges in mountainous areas, the transportation roads are dangerous and difficult, the transportation condition is poor, it is difficult to transport oversized member rods, and with more and more mountainous area long span road steel truss arch bridges generating, the construction has widely applicable prospects.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an upwardly supported multi-piece steel truss arch structure and an upwardly supported arch bridge. Background technique [0002] At present, the arch ring of the upward steel truss arch bridge has two trusses (such as Xinhegu Bridge and Najiehe Bridge) or three trusses (such as Daninghe Bridge). The number is increasing and the load is getting heavier. If two or three trusses are used for the top-supported steel truss arch ring, the chords will become larger and heavier, and the size and weight will exceed the limitations of transportation conditions. , the rods cannot be transported from the manufacturing plant to the bridge position, and two-piece or three-piece girders are not applicable. Contents of the invention [0003] The purpose of the present invention is to overcome the problem existing in the prior art that as the span of the bridge becomes larger and l...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problem existing in the prior art that as the span of the bridge becomes larger and larger, the size and weight of the arch ring chords of two or three girders become larger and heavier, and the size and weight exceed that of transportation. Due to the limitation of conditions, the above-mentioned shortcomings that the rods cannot be transported from the manufacturing plant to the bridge position provide an upward-supporting multi-piece steel truss-arch structure and an upward-supporting arch bridge

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