A kind of reconstruction construction method of box arch bridge

Abstract

The invention discloses a construction method for the reconstruction of a top-loaded box-type arch bridge, comprising the steps of: 1. firstly dismantling the arch bridge; 2. firstly constructing the arch bridge construction: 201, the lower support structure construction of the bridge; 202, the arch rib construction; 203, the follow-up Construction; 3. Demolition of the arch bridge after demolition; 4. Construction of the arch bridge after the construction: 401. Construction of the lower supporting structure of the bridge; 402. Construction of the arch rib; 403. Follow-up construction. The method of the invention has reasonable steps in design, simple construction and good use effect. The two arch bridges to be demolished of the reconstructed top-loaded arch bridge are demolished one after the other, and the reconstructed arch bridge is demolished after the construction of the first-constructed arch bridge in the new bridge is completed. The rear dismantling of the top-up arch bridge The arch bridge is dismantled to meet the needs of smooth traffic; in addition, a steel arch is used to construct the two arch ribs one after the other, and the steel arch is carried out with an arch support and a transverse moving device. The support and lateral movement can effectively improve the reconstruction and construction efficiency of the top-loaded arch bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a reconstruction construction method of an upward-supported box-shaped arch bridge. Background technique [0002] The overhanging arch bridge is a bridge whose deck is set on the main load-bearing structure of the bridge span (that is, the arch rib). At the junction of the bedrock, both ends of the arch ribs of the upward arch bridge are supported on the abutment, which is an important component supporting the structure on the arch. The abutment used to support the arch rib is a permanent support, which is generally a reinforced concrete structure supported on the bedrock. Among them, the arch rib is also called the main arch or arch ring. [0003] In consideration of safety, it is necessary to renovate the dangerous bridge with disease. When rebuilding dangerous bridges, the method usually adopted is to demolish the old bridges (that is, dangerous brid...

AI Technical Summary

Problems solved by technology

[0006] But nowadays, when the steel arch is moved horizontally, the construction operation is relatively random, there is no uniform and standardized horizontal installation equipment and horizontal moving method, and the steel truss is large in size and heavy, and the steel truss is difficult to move laterally , during the traversing process, there will inevitably be problems such as complicated traversing process, unstable steel truss, and slow traversing speed, and the steel truss is not easy to support after the traversing is in place.

At the same time, when removing the steel arch from under the poured arch rib, since the steel truss is firmly supported on the bottom of the poured arch rib, it is very difficult to remove the steel truss from under the arch rib, and the removal process It will inevitably cause deformation of the steel truss, and even cause damage to the steel truss

Especially when carrying out the reconstruction and construction of the overhead arch bridge, because after the old bridge is demolished, the new bridge needs to be constructed at the construction site of the old bridge, the construction site is limited, and the traffic flow and construction period must be ensured. more difficult

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