A Construction Method for Arch Ribs of an Overhead Box Arch Bridge

Abstract

The invention discloses a method for constructing an arch rib of an upwardly supported box-shaped arch bridge. The constructed upwardly supported arch bridge includes left and right symmetrically arranged arch ribs. When constructing the constructed upwardly supported arch bridge arch ribs, the steps include: 1. Construction of the lower support structure of the bridge; 2. Arch rib construction, the process is as follows: steel arch support construction, translation slideway and lifting device installation, steel arch assembly, arch support frame jacking, arch rib construction first, arch The lowering of the support frame, the installation of the traversing drive device, the lateral movement of the arch support frame, the lifting of the arch support frame, the construction of the post-construction arch ribs and the removal of the arch support frame. The invention is reasonable in design, simple in construction and good in use effect. A steel arch frame is used to construct two arch ribs one after the other, and an arch support and lateral movement device is used to support and laterally move the steel arch frame, which can be simple and convenient. , Quickly complete the construction process of the two arch ribs, and the construction process is safe and reliable, which can effectively improve the construction efficiency of the overhead arch bridge.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a method for constructing an arch rib of an upwardly 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 the arch ring. For the construction of the box-type box arch bridge whose arch rib is reinforced concrete arch ring, the arch rib usually adopts the pre-erected steel arch frame for cast-in-place construction; After the ribs a...

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Problems solved by technology

[0004] 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 complex 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

For example, when constructing the Xialaoxi Bridge located in the center of Sanyoudong Scenic Area, due to the limited construction site and serious traffic congestion, the construction difficulty was further increased, and the two arch ribs could not be constructed at the same time, and the construction period could not be guaranteed

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