Tension-fabricated bridge with prestressed hollow-plate-girders and middle transverse partitions and construction method of tension-fabricated bridge with prestressed hollow-plate-girder and middle transverse partitions

Abstract

The invention discloses a tension-fabricated bridge with prestressed hollow-plate-girders and middle transverse partitions and a construction method of the tension-fabricated bridge with prestressed hollow-plate-girders and middle transverse partitions. The existing prestressed hollow plate girder bridge connected via hinge joints is easy to crack and break or fail in bending and shearing. The tension-fabricated bridge with prestressed hollow-plate-girders and middle transverse partitions comprises prestressed hollow plate girders, longitudinal prestressed pipes, longitudinal prestressed steel strands, girder-end anchors, mid-span transverse partitions, transverse prestressed steel pipes, transverse prestressed steel strands, inter-plate-girder connecting rebars, inter-plate-girder longitudinal stressed rebars, cast-in-place connecting section concrete, side-beam lateral anchors and deck pavement rebars. The transverse partitions are disposed in the middle of the span of the prestressed hollow-plate-girders, and the reserved prestressed pipes are embedded for transverse prestressed tension of the prefabricated bridge. Therefore, single-slab stress, deck cracking and bridge plate bottom cracking of the traditionally assembled hollow plate girder bridge are effectively avoided, and structural durability is enhanced. The construction method is simple and practical and has evident economic technical benefit.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a prestressed hollow slab girder bridge and a construction method thereof, which are tensioned and assembled with transverse partitions. Background technique [0002] Prefabricated prestressed concrete hollow slab girder bridges are widely used because of the advantages of easy control of the quality of concrete pouring and prestressed tension, and convenient construction. However, with the development of the economy, the traffic volume and traffic load continue to increase, and the bridge construction becomes wider and wider, which leads to the prestressed concrete hollow slab girders connected by prestressed concrete longitudinal hinge joints in some constructions along the longitudinal hinge of the bridge or the longitudinal slab at the bottom of the slab girder. These cracks often lead to the reduction of the overall stress and lateral distribution perf...

AI Technical Summary

Problems solved by technology

[0004] The traditional design of hollow slab girder bridges mainly relies on the limited hinged concrete transmission and joint force between the slab girders. This concept comes from the practice of the former Soviet Union, mainly to facilitate factory prefabricated construction. With the continuous increase of vehicle load, this structural design method has exposed serious defects, that is, with the continuous increase of vehicle load, the lateral bending of the bridge increases, and the lateral bending resistance of this bridge structure is weak , resulting in the original hinged concrete being prone to cracking, fracture or bending-shear damage, unable to effectively distribute the vehicle load, resulting in the stress and collapse of the structural veneer

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