Integral lifting system and construction method for arch bridge ribs

Abstract

The invention discloses an integral lifting system and a construction method for arch bridge ribs. The integral lifting system comprises a pair of triangular steel frames, two lifting stations, arch rib brackets and an integral arch rib of an arch bridge, and a barge for conveying the integral arch rib. The triangular steel frames are fixedly rested on bridge piers and symmetrically disposed on two sides of main span of the arch bridge, an arch rib closure section in closure with the integral arch rib is disposed on the inner side of the arch bridge main span and close to the corresponding triangular steel frame, the lifting stations are disposed on the triangular frames respectively, the arch rib brackets are rested on the barge and support the integral arch rib, the lifting stations are connected with the integral arch rib through lifting steel stranded wires, the integral arch rib which is lifted up is in fixed closure with the arch rib closure sections, and accordingly the integral arch bridge is formed. The integral lifting system is adaptable to severe construction environments, and accordingly construction progress is quickened. The invention further provides the construction method for integral lifting of the arch bridge rib.

Description

technical field [0001] The invention relates to a lifting system and a construction method for an arch rib of an arch bridge, in particular to an overall lifting system and a construction method for an arch rib of an arch bridge. Background technique [0002] At present, the construction schemes of domestic arch bridge arch ribs include: cable hoisting scheme; Each construction scheme has its own advantages and disadvantages. The cable hoisting method requires a large-tonnage cable crane, and the second requires the assembly of two higher towers, and the installation of buckle cables, back cables and ground anchors, such as bridge positions. The terrain is gentle, and the use of cable cranes requires a large investment and high cost; the construction of the full hall support method requires a large amount of support materials, and secondly, it affects navigation and has a long construction period. It is mainly suitable for arch bridges with small spans and no navigation requ...

AI Technical Summary

Problems solved by technology

Each construction scheme has its own advantages and disadvantages. The cable hoisting method requires a large-tonnage cable crane, and the second requires the assembly of two higher towers, and the installation of buckle cables, back cables and ground anchors, such as bridge positions. The terrain is gentle, and the use of cable cranes requires a large investment and high cost; the construction of the full hall support method requires a large amount of support materials, and secondly, it affects navigation and has a long construction period. It is mainly suitable for arch bridges with small spans and no navigation requirements; Solid construction can reduce a large number of high-altitude operations, the construction is safe, and can greatly reduce the interference to the water traffic under the bridge. However, due to the limited capacity and economy of the rotating system, it is only suitable for small and medium-span arch bridges.

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