Single-arch-rib framing swivel construction steel box arch bridge and construction method thereof

Abstract

The invention belongs to the technical field of arch bridge construction, and relates to a single-arch-rib framing swivel construction steel box arch bridge and a construction method thereof. The archbridge comprises a lower rotating disc located on a foundation, a horizontal rotating system fixedly installed on the lower rotating disc, an upper rotating disc installed on the horizontal rotatingsystem in a rotating mode, two sets of bridge deck longitudinal beams fixed to the upper rotating disc, and a vertical rotating hinge installed on the inner side of the upper rotating disc and used for fixing an arch rib to be constructed. The upper rotating disc, the lower rotating disc and arch ribs are arranged in a left-right framing manner, transverse supports and inter-rib cross beams are arranged between the left framing arch rib and the right framing arch rib, a suspender cross beam is fixedly mounted between the bridge deck longitudinal beams, suspenders are arranged at equal intervals along the longitudinal direction of each arch rib, the upper ends of the suspenders are anchored to the arch ribs, the lower ends of the suspenders are anchored to the suspender cross beams, a plurality of secondary cross beams are arranged between the suspender cross beams, and the suspenders, the suspender cross beams, the secondary cross beams and the bridge deck longitudinal beams are connected to form a lattice system in order to construct a bridge deck framework. The construction method guarantees the construction quality of the arch bridge, reduces safety risks and construction cost,and achieves convenient construction.

Description

technical field [0001] The invention belongs to the technical field of arch bridge construction, and relates to a steel box arch bridge with single arch rib frame-framing construction and a construction method thereof. Background technique [0002] With the application of steel structures on various bridges, the spanning capacity of the bridge is greatly improved, and the stability of the bridge load-bearing structure is increased. The steel box arch is favored by bridge designers for its super strong spanning capacity. However, the terrain in mountainous areas is complex and restricted by various factors such as terrain, climate, geology and hydrology, the construction of arch bridges faces many difficulties. The common construction methods of arch bridges include cable hoisting, cable-stayed buckle-hanging method and swivel construction method. Cable hoisting cable-stayed buckle-hanging construction technology is relatively mature and reliable, but for Quaternary soil laye...

AI Technical Summary

Problems solved by technology

Cable hoisting cable-stayed buckle-hanging construction technology is relatively mature and reliable, but for Quaternary soil layers, strongly weathered and broken strata, and areas with relatively developed karst, the bearing capacity of the foundation is low, and the buckle system is limited by the geological conditions on both sides of the bank Difficult; or due to terrain restrictions, there is a problem that the distance between the anchor spindle and the buckle tower is too short or too long, which affects the force of the cable hoisting system; the cable hoisting high-altitude operation has a long construction period and high safety risks

In the traditional whole swivel construction method, the abutment is located on a steep mountain slope, and the construction of the whole swivel abutment requires a large amount of excavation and difficult protection, which affects the stability of the mountain and easily induces geological disasters; the height difference between the left and right arch ribs corresponds to the ground line Larger, higher brackets need to be erected to assemble the arch ribs; the foundation of the lower turntable ring is large, and the upper turntable needs to add connecting beams between the arch seats, which requires a large amount of materials

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