Construction method of arch ribs of deck type box arch bridge

Abstract

The invention discloses a construction method of arch ribs of a deck type box arch bridge. The constructed deck type arch bridge comprises the two arch ribs which are symmetrically arranged on the left and right sides. During the construction of the arch ribs of the deck type arch bridge, the construction method comprises the following steps: (1) performing the construction of a lower supporting structure of the bridge; (2) performing the construction of the arch ribs. The process of the construction of the arch ribs comprises the steps of performing the construction of steel arch supports, mounting translation slideways and lifting devices, assembling a steel arch, lifting up an arched support frame, performing the construction of the earlier-construction arch rib, laying the arched support frame downward, mounting transverse-movement driving devices, transversely moving the arched support frame, lifting up the arched support frame, performing the construction of the later-construction arch rib, and removing the arched support frame. The construction method of the arch ribs of the deck type box arch bridge is reasonable in design, simple in construction and good in application effect. The two arch ribs are constructed one after the other by virtue of the steel arch, and the steel arch is supported and transversely moved by virtue of an arch supporting and transverse-movement device, so that the construction process of the two arch ribs can be completed simply and quickly. The construction process is safe and reliable. The construction 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 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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