Large-span double-arch axis combined arch bridge and construction method thereof

Abstract

The invention discloses a large-span double-arch axis combined arch bridge, which comprises a main beam, a middle bridge pier serving as a middle fulcrum, two auxiliary bridge piers serving as two end fulcrums, an arch axis assembly and two upwards protruded arc arch axis bent beams, wherein the arch axis assembly is arranged on the middle bridge pier, two ends of the arch axis assembly are respectively butted with the inside ends of the two arch axis bent beams, the outside ends of the two arch axis bent beams are respectively arranged on the two auxiliary bridge piers, and the two arch axisbent beams are connected with the main beam through a plurality of stay ropes. The invention also discloses a construction method of the arch bridge. By adopting the double-arch axis method, the bending strength of the section of the arch bridge is greatly increased, the bending moment of the arch section at the middle fulcrum is reduced, the vertical displacement of the arch waist is low, and the deformation of the main beam is reduced, so that the whole bridge is stressed reasonably. By using the method, the construction cost can be effectively reduced, and the construction period is shortened.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a composite arch bridge with a relatively large span and a construction method for the composite arch bridge. Background technique [0002] The design of arch bridges is widely used in the construction of existing bridges. It has the advantages of large span, beautiful appearance, and the ability to make full use of the compression resistance of materials. However, the existing long-span arch bridges all have the defects of large horizontal thrust, relatively difficult controllability of lateral stability, and relatively difficult construction. [0003] The arch wire shaft adopted in the US patent US7469438 can effectively solve the above-mentioned defects, reduce the horizontal thrust of the arch bridge, and have good lateral stability, but it still has the following deficiencies: [0004] 1. Due to the adjustment of the arch axis, the bending moment of the main arch section at...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the adjustment of the arch axis, the bending moment of the main arch section at the middle fulcrum is relatively large, and the material cost of the main arch section is relatively large;

[0005] 2. Because the arch axis deviates from the pressure line of the arch, a large bending moment is generated, and the vertical displacement of the arch waist is large, resulting in a large deformation of the main beam, which is difficult to meet the functional requirements of normal use

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