Reinforcing construction method based on wet-joint-free segment precast concrete box girder

Abstract

The invention discloses a reinforcement construction method based on a wet-joint-free segment precast concrete box girder. The method sequentially comprises the following steps: performing reinforcement construction positioning and lofting on a top plate and a bottom plate of the prefabricated box girder, treating a reinforcement joint surface, drilling anchor bolt holes, blanking and drilling steel frames for reinforcement, chemically anchoring bolts, mounting upper chords and lower chords, splicing and welding diagonal web members and vertical rods, injecting glue on the joint surface, derusting and coating the steel frames and components. The method has the advantages that the longitudinal steel frame components are installed in the box chamber, the number of the webs of the box girder is increased, the main stress and shearing force distribution conditions of the original concrete webs of the box girder are improved, the force transmission effect between joints of the prefabricated box girder is enhanced, the rigidity of the box girder is improved, and then the purposes of bending resistance and shearing resistance of the wet-joint-free segment prefabricated box girder bridge are achieved.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a reinforcement construction method based on prefabricated concrete box girders without wet joint segments. Background technique [0002] The non-wet joint segmental prefabrication process of the bridge structure is a construction process in which the box girder is divided into several segments longitudinally and assembled into a whole bridge through prestressing after prefabrication in the factory or on site. This method does not require on-site pouring of joints. The craft originated in Europe, prevailed in America, and was introduced to my country in 2001. Because it is prefabricated in the factory, there is no need to set up supports on site, the disturbance to the site is small, the beam pouring quality is good, and the construction period is short. It is especially suitable for urban viaducts and railway bridges. It is one of the most widely used cons...

AI Technical Summary

Problems solved by technology

[0011] The purpose of this invention is to provide a construction method for prefabricated cantilever assembled continuous beams with side-span non-wet joint segments, which cannot solve the post-reinforcement problem of prefabricated concrete box girders without wet joint segments

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