Mountainous area high-pier bridge step dislocation construction method

Abstract

The invention discloses a mountainous area high-pier bridge step dislocation construction method. The method comprises the following steps: 1, a hanging basket truss walks to N sections, and a mounting formwork binds N sections of bottom plate steel bars and N-1 sections of top plate steel bars; 2, concrete of N sections of bottom plates and N-1 sections of top plates is poured, and meanwhile, installation construction of N + 1 sections of folded webs is carried out by utilizing the hanging basket self-hoisting folded webs; and 3, the hanging basket truss walks to N + 1 sections, the prestressof the top plate of the N-1 sections is tensioned, and circulation of the next section is conducted in a reciprocating mode in sequence. According to the construction method disclosed by the invention, one operation area is expanded to three operation areas; the three sections are independently and synchronously constructed; reasonable procedure connection and no interference are achieved, meanwhile, the hanging basket self-hoisting folded webs are used for installation and construction of the N + 1 sections of folded web plates, installation and hoisting of the folded webs of the mountainousvalley high pier bridge are facilitated, the limitation of a traditional construction method on a bridge construction site is overcome, installation of the folded webs is facilitated, meanwhile, theconstruction cost can be saved, and the construction efficiency can be improved.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a step dislocation construction method for high pier bridges in mountainous areas. Background technique [0002] With the continuous progress and development of bridge engineering in our country, folded steel web bridges have been gradually popularized, and their construction methods have gradually matured. In recent years, the traditional bridge construction methods have been unable to meet the construction of high pier folded web bridges in mountainous areas. For example, a bridge is located in a mountainous canyon with a maximum bridge height of 108 meters. For the construction of cantilever folded webs, tower crane self-hoisting and crane installation cannot be selected. construction. For this reason, bridge engineers need to study how to carry out the construction of high pier folded web bridges in mountainous areas, so as to overcome the limitations of traditional constr...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a step dislocation construction method for bridges with high piers in mountainous areas in view of the fact that traditional bridge construction methods can no longer meet the construction problems of bridges with high piers and folded webs in mountainous areas. limitations, it is convenient for the installation of the folded web, and at the same time, it can save construction costs and improve construction efficiency

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