Prestressed U-shaped rid rapid shear-resisting and reinforcing box girder structure and method

Abstract

A prestressed U-shaped rid rapid shear-resisting and reinforcing box girder structure jointly comprises an angular anchoring device (1), an anchor ring (2), U-shaped ribs (3), grating ribs (4), a concrete box girder (5) and an anti-cracking mortar layer (6), the U-shaped ribs (3) are perpendicular to the axial direction of the concrete box girder (5) and are arranged at intervals in a U-shaped manner along the side surfaces and the bottom surface of the concrete box girder (5); the two ends of the U-shaped ribs (3) are fixed on the upper portions of the two side surfaces of the concrete box girder (5) through the angular anchoring device (1) and the anchor ring (2); the grating ribs (4) are hung on the outer surfaces of the side surfaces and the bottom surfaces of the concrete box girder (5); and the anti-cracking mortar layer (6) covers the U-shaped ribs (3) and the grating ribs (4) in modes of spraying, smearing or pouring, and is integrally combined to the concrete box girder (5). In the structure, by construction of the U-shaped ribs, prestress loss is reduced, the size of an anchor is also reduced, an anchoring space is decreased, and the reinforcing effect of the concrete boxgirder is continuous and effective.

Description

Technical field [0001] The invention relates to a reinforced bridge structure, in particular to a box girder structure and method for rapid shear-resistant strengthening of prestressed U-shaped bars, and belongs to the field of civil engineering. Background technique [0002] In my country's bridge construction, Daxing built a prestressed concrete box girder bridge. Due to the large torsional rigidity and good stability of the box section, it is suitable for the requirements of modern construction methods, so it has been widely used. However, due to the thin design section, construction quality defects, and serious overload of the bridge, a large number of diseases have occurred in the existing concrete box girder, resulting in a decrease in the bearing capacity of the bridge and affecting the safety performance of the bridge. Therefore, how to reinforce the existing box girder bridge conveniently and quickly has become an urgent problem to be solved. [0003] For the existing bo...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of prestressed U-shaped reinforcement fast shear reinforcement box girder structure and method, to solve the poor initiative existing in the concrete box girder reinforcement process, the length of the prestressed tendons is small, the loss of prestress is large, and the operation is complicated. Difficulty in tensioning, large anchoring space and other technical problems

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