Anti-overturning structure of bridge with single column pier

Abstract

The invention discloses an anti-overturning structure of a single-pier bridge. The anti-overturning structure is used for solving the problem that the single-pier bridge is prone to overturning. The anti-overturning structure comprises auxiliary supporting blocks installed on the two sides of a bridge pier stand column, a self-aligning support installed between the bridge pier stand column and a bridge beam bottom, and anti-falling devices installed between the auxiliary supporting blocks and the bridge beam bottom, wherein the self-aligning support comprises a first plate, a second plate and a third plate which are arranged from top to bottom, the three plates are matched in an inserting connection mode, and meanwhile a friction speed reduction structure is arranged. Each anti-falling device comprises an embedded part, a guide post, belleville springs, anti-loose locking parts and a dust cover. The anti-overturning structure is simple, applicable to all single-pier bridges, wide in application range, applicable to construction of new bridges and also applicable to transformation of old bridges.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to an anti-overturning structure of a single column pier bridge. Background technique [0002] Curved bridges such as urban overpasses and high-speed ramps 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. However, the phenomenon of overloading of heavy-duty vehicles in our country is common at present, and the overloading of individual vehicles even reaches 200% to 300%, resulting in many overturning accidents in the use of bridges of this type of structure. [0003] In terms of the bending and shear bearing capacity of bridges, insufficient attention has been paid to the effect of eccentric accidental overloading. In recent years, overturning accidents of continuous box girder bridges with single-pillar piers have occ...

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

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