Double-semi-directional ramp steel box girder for municipal engineering bridge construction and construction process

Abstract

The invention discloses a double-semi-directional ramp steel box girder for municipal engineering bridge construction. The double-semi-directional ramp steel box girder comprises a steel box girder I, an auxiliary cross beam I, an auxiliary cross beam II, a steel box girder II, a supporting plate, an auxiliary supporting mechanism I, a damping mechanism, an auxiliary supporting mechanism II and a maintenance opening blocking mechanism. The auxiliary cross beam I is arranged on one side of the steel box beam I; the auxiliary cross beam II is arranged on one side of the steel box beam II; the supporting plate, the auxiliary supporting mechanism I, the damping mechanism and the auxiliary supporting mechanism II are sequentially arranged in the steel box girder II; the internal structures of the steel box girder I and the steel box girder II are the same; the auxiliary cross beam I and the auxiliary cross beam II have the same structure; the maintenance opening plugging mechanism is arranged at the bottom of the steel box girder II; and a plurality of longitudinal rib plates I and transverse rib plates are arranged at the bottom of the auxiliary cross beam I. The auxiliary supporting mechanism I, the auxiliary supporting mechanism II, the supporting plate and the damping mechanism are fixed at intervals, and the damping and weight reducing effects are achieved under the condition that the structural stability is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, in particular to a double semi-directional ramp steel box girder for municipal engineering bridge construction and a construction process. Background technique [0002] As one of the main structural forms of long-span bridges, steel box girders are called steel box girders because the main body of the shell is shaped like a box; the cross-section of steel box girders is mostly a flat and wide trapezoidal cross-section; Convenience, elevated roads in urban areas often use steel box girders to build circular ramps; however, there are still some unavoidable problems: [0003] 1) The inside of the steel box girder is mostly welded with steel plates to support it. Because the supporting steel plate runs through the whole steel box girder, the amount of steel is relatively large, and it is easy to make the body too heavy, and the installation and operation are inconvenient. Structural defo...

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Problems solved by technology

[0003] 1) The inside of the steel box girder is mostly welded with steel plates to support it. Because the supporting steel plate runs through the whole steel box girder, the amount of steel is relatively large, and it is easy to make the body too heavy, and the installation and operation are inconvenient. Structural deformation occurs;

[0004] 2) The interior of the steel box girder is mostly a welded rigid connection structure, which cannot effectively absorb shock when subjected to strong vibrations, and its internal shock absorption effect is poor, and it is easy to cause damage to the rigid structure for a long time;

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