Prestressed concrete bridge wet joint concrete and bridge deck pavement concrete prestressing method

Abstract

The invention discloses a method for prestressing wet joint concrete and bridge deck pavement concrete of a prestressed concrete bridge. The method comprises the steps: manufacturing an anti-collision belt after a prestressed concrete main beam is installed, applying a static load to the main beam, connecting transverse partition beams / plates, installing a wet joint concrete bottom formwork, arranging longitudinal steel bars on the lower portion of wet joint concrete, arranging an upper-layer steel bar net and a lower-layer steel bar net in bridge deck pavement concrete, and pouring, maintaining and unloading the wet joint concrete and the bridge deck pavement concrete. According to the method, wet joint concrete and bridge deck pavement concrete of the prestressed concrete bridge are both changed into prestressed concrete, so that the prestressed concrete and the prestressed concrete girder can deform together without cracks, and the use quality of the bridge is guaranteed.

Description

technical field [0001] The invention relates to the technical field of highway bridges, in particular to a method for prestressing wet joint concrete and bridge deck paving concrete of prestressed concrete bridges. Background technique [0002] With the rapid development of my country's economy, road traffic construction has developed rapidly for decades and will continue to develop at a high speed. Bridges are an important part of roads, and their number is also increasing rapidly. According to incomplete statistics, there are currently various types of There are nearly 900,000 highway bridges, and more than 10,000 bridges are built every year. my country has become the world's "bridge country" and "bridge power". [0003] Prestressed concrete box bridges and prestressed concrete T bridges are commonly used superstructure bridge types with large quantities and wide areas in various roads. The construction methods are: prestressed concrete box girders and prestressed concrete...

AI Technical Summary

Problems solved by technology

The existing problems are: the main girder is prestressed concrete, while the wet joint and bridge deck pavement are non-prestressed concrete. The prestressed concrete main girder has the ability to resist large deformation without cracking, and the non-prestressed wet joint Joint concrete and bridge deck pavement concrete have no ability to resist large deformation without cracking. The fact is that wet joint concrete and bridge deck pavement concrete work together with the main girder to produce large deformation when subjected to load. As a result, the wet joint concrete and the bridge deck pavement concrete will produce cracks at the beginning of the bridge's use, which will induce other diseases (such as steel bar corrosion, etc.), and affect the quality and service life of the bridge.

Images