Anti-overturning reinforcement system for single-column pier bridges and mounting method

Abstract

The invention provides an anti-overturning reinforcement system for single-column pier bridges, which comprises a steel structure support, a steel connecting base, and rigid tie rods; the steel structure support comprises two semicircular hoops with cantilevers, and the surface, which is in contact with a pier, of each semicircular hoop is provided with reserved holes for the mounting of anchor bolts at intervals; the external surfaces of the semicircular hoops are provided with axial reinforcing ribs; the two semicircular hoops are connected through first high-strength bolts to hoop both sides of the pier, and the semicircular hoops and the cantilevers are of an integrated structure; one end, which is far from the hoop, of each cantilever is provided with a vertically through mounting through hole; the steel connecting base is fixed on the bottom of a bridge, the center of the steel connecting base and the center of the through hole are on the same vertical line, and both ends of eachrigid tie rod are respectively fixedly connected to the steel structure support and the steel connecting base. The invention can effectively enhance the anti-overturning performance of a single-column pier bridge, the structure is simple, stress is clear, construction is convenient, the anti-overturning reinforcement system has relatively good economical efficiency and appearance, and the invention is suitable for popularization and application in the field of bridge reinforcement.

Description

technical field [0001] The invention belongs to the technical field of bridge reinforcement, in particular to an anti-overturning reinforcement device for a single-column pier bridge. Background technique [0002] In recent years, in order to relieve traffic pressure, many cities have built numerous urban viaducts and overpasses. Single-column pier bridges are widely used due to their advantages of small footprint, large space under the bridge, and simple shape. However, the single-column pier bridge adopts a single bearing form in the transverse bridge direction, and the lateral restraint on the main beam is weak. Under large eccentric load vehicles or earthquakes, the bearing will be emptied, causing the main beam to overturn laterally. of major accidents. For example, in 2007 Baotou Minzu East Road viaduct rolled, in 2010 Nanjing Inner Ring viaduct rolled during construction, Harbin Yangmingtan Bridge ramp bridge in 2012, and Ganyue Expressway Heyuan exit ramp bridge in...

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Problems solved by technology

[0004] Aiming at the above-mentioned problems existing in single-pillar bridges, the invention provides a reinforcement device for preventing the overturning of the main girder of single-pillar bridges, which can effectively solve the problems of support voids and main girder overturning that may occur in existing single-pillar bridges, and The device is easy to install, has clear force and beautiful appearance, and can be popularized and applied in urban bridge maintenance and reinforcement projects

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