Anti-overturning strengthening method for single-column pier bridge

Abstract

The invention provides an anti-overturning strengthening method for a single-column pier bridge. The method comprises the following steps: pre-assembling a steel hoop and a steel corbel into an overall steel structure; lifting the overall steel structure formed by the steel hoop and the steel corbel to the top of a bridge pier upright column by using a lifting device; fixing the overall steel structure formed by the steel hoop and the steel corbel to the top of the bridge pier upright column; placing a plurality of intelligent supports on the steel corbel; enabling a bridge support and the intelligent supports at two sides to form a 'seesaw' structure; adjusting the heights of the intelligent supports to enable the upper surfaces of the intelligent supports to be tightly laminated with a bridge beam bottom and enable the lower surfaces of the intelligent supports to be tightly laminated with the steel corbel; and acquiring electric signals generated by piezoelectric ceramics in the intelligent supports in real time so as to judge whether the intelligent supports have the phenomena of disengagement and deflection. The anti-overturning strengthening method provided by the invention improves the anti-overturning performance of the single-column pier bridge and has relatively good construction convenience, relatively wide applicability and excellent economical efficiency.

Description

technical field [0001] The invention relates to an anti-overturning reinforcement method for single-pillar pier bridges. Background technique [0002] At present, the curved bridges such as urban overpasses and high-speed ramps in my country mostly adopt the single-column cast-in-place continuous box girder structure. The lower structure of this type of bridge has the advantages of reducing land occupation, increasing visual field and beautiful bridge. But at present, there is a common phenomenon of overloading of heavy-duty vehicles in our country, and the overloading of individual vehicles even reaches 200% to 300%, which has caused many overturning accidents in the use of bridges with this type of structure. [0003] At present, bridge designers focus on the bending and shear bearing capacity of the bridge, and pay insufficient attention to the effect of eccentric accidental overload. In recent years, overturning accidents of continuous box girder bridges with single-pil...

AI Technical Summary

Problems solved by technology

The reason is that most of the accidental bridge pier columns are supported by a single fulcrum in the transverse direction. Under the partial load of overloaded vehicles, the lateral overturning resistance of the structure is poor, especially the bridge deck of the small-radius curved single-column ramp box girder bridge is narrow. The self-weight is small, and the proportion of vehicle load in the load combination is large

At the same time, because the current highway bridge code has no relevant regulations on lateral overturning stability, it is in a blank state, and the calculation and analysis of bridge lateral stability under the action of eccentric accidental overload is often ignored in the design, which makes the use of the structure under accidental action bring hidden dangers

Images