Deck type box arch bridge reconstruction method

Abstract

The invention discloses a deck type box arch bridge reconstruction method. The method comprises the steps: 1 first-dismantled arch bridge dismantling; 2 first-constructed arch bridge constructing, wherein the steps comprises 201 bridge lower portion support structure constructing, 202 arch rib constructing and 203 follow-up constructing; 3 later-dismantled arch bridge dismantling; 4 later-constructed arch bridge constructing, wherein the steps comprises 401 bridge lower portion support structure constructing, 402 arch rib constructing and 403 follow-up constructing. The method has the advantages that the step design is reasonable in step design, construction is simple and convenient, the using effect is good, two to-be-dismantled arch bridges of a reconstructed deck type arch bridge are dismantled first and later, and the later-dismantled arch bridge of the reconstructed deck type arch bridge is dismantled after construction of a first-constructed arch bridge in a newly-built arch bridge is completed to meet the smooth traffic requirement; and in addition, two arch ribs are constructed first and later by adopting one steel arc frame, the steel arch frame is supported and transversely moved by adopting an arch frame supporting and transverse moving device, and therefore the reconstruction efficiency of the deck type arch bridge can be effectively improved.

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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