An unbalanced anti-torsion and anti-overturning structure of a single-column pier of a curved girder bridge and its construction method

Abstract

The invention provides an unbalanced anti-torque and anti-overturning structure of a single column pier of a curved beam bridge and a construction method thereof. The unbalanced reinforced structure can be utilized to adapt to the curve setting of the curved beam bridge and improve the anti-overturning ability; an oblong hole of L-shaped channel steel is set to adapt to the small displacement movement of a bridge hoop; and a soft steel column and a spring are set to weaken the torque generated by the curved beam bridge and improve the overall mechanical performance of the structure, and especially has a good reinforcement effect for the single column pier of the curved beam bridge.

Description

technical field [0001] The invention relates to an anti-overturning structure in the field of bridges and a construction method thereof, in particular to an unbalanced anti-torsion and anti-overturning structure of a single-column pier of a curved girder bridge and a construction method thereof. Background technique [0002] With the rapid development of my country's transportation, the rapid development of my country's urban interchanges, elevated roads, expressways and other forms of transportation has greatly promoted the development of my country's transportation and reduced traffic congestion. In urban overpasses, viaducts or high-speed ramps, single-column piers are often set up. The pier structure of this setting often only uses single-column piers, and supports are set on the single-column piers, and the upper part of the supports supports the beam body; the single-column pier It is easy to generate a large overturning force at the place where the bridge is installed...

AI Technical Summary

Problems solved by technology

In urban overpasses, viaducts or high-speed ramps, single-column piers are often set up. The pier structure of this setting often only uses single-column piers, and supports are set on the single-column piers, and the upper part of the supports supports the beam body; the single-column pier It is easy to generate a large overturning force, which will cause the bridge deck to tilt and separate from the single-pillar pier. What is more serious is that the bridge deck will roll over and the bridge structure will be completely damaged.

[0003] At present, new structures have been proposed for the anti-overturning of single-column bridge piers. These structures are all equipped with reinforcement structures to enhance the connection performance between the upper structure of single-column bridge piers and the lower beam body, such as adding tie rods, corbels, and prestressed suspenders, thereby improving the structure. However, the above-mentioned reinforcement methods have the following disadvantages: 1) For curved girder bridges, because the bridge deck structure has a certain slope, the overturning force formed by the load on both sides of the single-column pier is not the same. The above problems cannot be considered, which leads to constraints in the application of curved girder bridges, and cannot give full play to its structural characteristics; 2) Due to the left and right loads of curved girder bridges, after the reinforcement structure is installed, the loads on the left and right sides of the single-column pier are different. Not only the overturning moment is generated, but also a certain torque is formed. Although the above torque is small, it generally does not affect the stability of the structure, but the existence of long-term torque will affect the strength of the contact surface, cause local instability, and reduce the strength of the structure

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