CN110700126A

CN110700126A - Single-column pier bridge anti-overturning device

Info

Publication number: CN110700126A
Application number: CN201911104113.5A
Authority: CN
Inventors: 周宏宇; 刘亚南; 曹晓庆; 周运
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-01-17

Abstract

The invention relates to an anti-overturning device for a single-column pier bridge, which is arranged between a main beam of the bridge and a column of the pier and comprises a viscous damper, a hinged support and a chemical anchor bolt. The hinged support is firstly anchored on the bridge girder and the pier upright post, and viscous dampers are arranged on two sides of the bridge girder and the pier upright post. The bridge girder is connected with the pier upright post through the viscous damper. According to the invention, the viscous damper is additionally arranged between the bridge girder and the pier upright post, so that the bridge girder can be effectively prevented from overturning, and the anti-overturning performance of the single-column pier bridge is improved. The invention has simple structure, convenient construction and excellent economical efficiency.

Description

Single-column pier bridge anti-overturning device

Technical Field

The invention belongs to the field of bridge substructure reinforcement, and relates to an anti-overturning device for a single-column pier bridge.

Background

In order to save land, most urban overpasses and expressway ramps in China adopt a single-column pier box girder structure form. The single-column pier bridge has the advantages of small occupied area, effective utilization of space, attractive bridge lines and the like.

However, in practical engineering application, under the action of accidental overrun eccentric load, the single-column pier box girder bridge has a great overturning risk. In recent years, a plurality of single-pier bridges overturn accidents occur in China, such as: the national road 312 tin-free section tin port road overpass bridge deck rollover accident causes casualties and property loss, and the safety problem of the single-column pier bridge becomes increasingly prominent.

In order to prevent the recurrence of the single-column pier bridge overturning accident, related departments increase the detection and reinforcement strength of the single-column pier bridge in recent years. The existing reinforcing method is mainly to add piers or to set up steel frame supporting bridges beside the upright columns of the piers, and the reinforcing method also achieves certain effect. But also has the limitations of high construction difficulty, long construction period, high consumption and the like, and does not consider the seismic performance of the reinforced bridge.

Disclosure of Invention

The invention aims to provide an anti-overturning device for a single-column pier bridge, aiming at solving the problems in the prior art. The invention improves the anti-overturning performance and the anti-seismic performance of the single-column pier bridge by additionally arranging the pair of viscous dampers and the hinged support, and has the advantages of simple reinforcing method, convenient construction and high economy.

The invention is realized by the following technical method:

1. the utility model provides an antidumping device of single-column mound bridge for consolidate original single-column mound bridge, its characterized in that: the viscous damper comprises a viscous damper 3, a hinged support 4 and a chemical bolt 5; the hinged supports 4 are firstly anchored on two sides of the bridge girder 2 and the pier columns 1, and a pair of viscous dampers 3 are arranged on two sides of the pier columns 1 and the bridge girder 2. The bridge girder 2 is connected with the pier upright post 1 through a viscous damper. A series of the present devices were installed where reinforcement was required.

The viscous damper is a speed-dependent damper, and the liquid in the damper generates a certain speed in a closed container to consume energy and provide a large damping force. When the bridge rotates under the unbalance loading action of an overloaded vehicle, the liquid in the viscous dampers at the two sides flows at a certain speed to generate damping force. One side of the viscous damper installed on two sides of the pier column is pulled and pressed, and the viscous damper is stressed in a coordinated manner to prevent the bridge from overturning.

Further, the hinged support is fixed on the bridge girder and the pier column by chemical bolts.

Further, the viscous damper is directly connected with the hinged support in a hinged mode.

The invention provides an anti-overturning device for a single-column pier bridge. Through additionally arranging the viscous damper and the hinged support, the anti-overturning performance and the anti-seismic performance of the single-column pier bridge are improved, the construction is simple, and the construction cost is low.

Has the advantages that:

1. through addding viscous damper and hinged-support, reduced the influence of unbalance loading to the bridge, improved the atress condition of bridge, improved the antidumping performance and the anti-seismic performance of single column mound bridge. Effectively avoiding the occurrence of overturning accidents.

2. The reinforcing method is simple, convenient to construct and high in economical efficiency.

Drawings

FIG. 1, a front view of the present invention

FIG. 2 is a three-dimensional schematic diagram of the joint of the viscous damper and the hinged support of the invention

Wherein: 1. pier stand, 2, bridge girder, 3, viscous damper, 4, hinged-support, 5, chemical bolt.

Detailed Description

The present solution is further described in detail below with reference to the attached drawings:

the hinged supports 4 are firstly anchored on two sides of the bridge girder 2 and the pier upright post 1 by chemical bolts 5, and a pair of viscous dampers 3 are arranged on two sides of the bridge girder 2 and the pier upright post 1. The bridge girder 2 is connected with the pier upright post 1 through the viscous damper 3. A series of the present devices were installed where reinforcement was required. When the bridge girder 2 is laterally turned, the pair of viscous dampers 3 will restrain the bridge girder 2.

As described above, the present invention can be realized.

The technical solution of the present patent is not limited to the above-mentioned embodiments, and all the technical modifications made according to the technical solution of the present patent are within the protection scope of the present patent.

Claims

1. The utility model provides an antidumping device of single column mound bridge, installs on bridge girder is with pier stand, its characterized in that: the viscous damper comprises a viscous damper 3, a hinged support 4 and a chemical bolt 5; the hinge supports 4 are firstly anchored on two sides of the bridge girder 2 and the bridge pier columns 1, a pair of viscous dampers 3 are arranged on two sides of the bridge pier columns 1 and the bridge girder 2, and the bridge girder 2 is connected with the bridge pier columns 1 through the viscous dampers.

2. The single-column pier bridge anti-overturning device according to claim 1, which is characterized in that: the hinged support is fixed on the bridge girder and pier upright post by chemical bolts.

3. The single-column pier bridge anti-overturning device according to claim 1, which is characterized in that: the viscous damper is hinged with the hinged support.

4. The single-column pier bridge anti-overturning device according to claim 1, which is characterized in that: multiple anti-overturning devices may be provided where reinforcement is desired.