Anti-overturning structure for single-pier bridge girder

Abstract

The invention discloses an anti-overturning structure for a single-pier bridge girder. The anti-overturning structure comprises a steel girdle structure arranged on a pier stand column in a sleeving mode. The steel girdle structure comprises two steel girdles with the same structure, a plurality of opposite-pulling high-strength bolts arranged on the joints of the steel girdles and a plurality of anchor bolts arranged in preformed holes in the steel girdles. The opposite-pulling high-strength bolts enable the steel girdles to be combined into the integral steel girdle structure. The steel girdle mechanism and the pier stand column are fixed through the anchor bolts. Two steel brackets are welded to the two steel girdles. The height of an intelligent supporting base arranged between the steel brackets and the bottom of the bridge girder is adjustable, and it is ensured that the upper surface of the intelligent supporting base is tightly attached to the bottom of the bridge girder and the lower surface of the intelligent supporting base is tightly attached to the steel brackets. According to the anti-overturning structure for the single-pier bridge girder, the anti-overturning performance of the single-pier bridge girder is improved; the anti-overturning structure has good construction convenience, wide applicability and excellent economy.

Description

technical field [0001] The invention relates to an anti-overturning structure of a single-pillar pier bridge. 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-pillar piers h...

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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