Unit type large-corner damping multi-directional deflection bridge expansion device

Abstract

The invention relates to a unit type large-corner damping multi-directional deflection bridge expansion device, belongs to the technical field of bridge accessory devices, and aims to adjust expansionjoints between two adjacent girders of a bridge. The expansion joints are arranged along the transverse direction of the bridge. The expansion device comprises intersecting comb plates which are arranged on adjacent girders by means of anchoring assemblies, wherein each comb plate comprises a fixed plate of which one end is connected with the anchoring assemblies, an axle roller which is arrangedbelow the fixed plate along the transverse direction of the bridge, and a group of split movable comb teeth; the other end of each fixed plate is provided with convex teeth and concave parts at intervals; the axle rollers are fixedly connected with the convex teeth; the roots of the movable comb teeth are arranged in the concave parts, and are hinged to the axle rollers by means of connecting assemblies; the girders are provided with support units located in the expansion joints; the support units are used for supporting the end parts of the movable comb teeth on adjacent girders. By adoptingthe unit type large-corner damping multi-directional deflection bridge expansion device, the rotation of the movable comb teeth is realized truly, the movable comb teeth are always kept in a flush state, and compression damage to the expansion device is avoided.

Description

technical field [0001] The invention belongs to the technical field of bridge accessory devices, and relates to a bridge telescopic device, in particular to a unit type large-rotation-angle damping shock-absorbing multi-directional displacement bridge telescopic device. Background technique [0002] As one of the important accessories of the bridge, the bridge expansion device plays a vital role in the use of the bridge. It can not only ensure the stability and firmness of the bridge, but also keep the vehicle running smoothly and without jumping. Because the bridge beam is affected by temperature changes, concrete creep, prestressed deformation, beam body weight and vehicle load factors, the beam body will not only undergo expansion and contraction deformation, but also vertical rotation deformation. The traditional comb-type expansion device The combination of fixed comb plate and movable comb plate can meet the longitudinal movement of the bridge, but the vertical rotatio...

AI Technical Summary

Problems solved by technology

Because the bridge beam is affected by temperature changes, concrete creep, prestressed deformation, beam body weight and vehicle load factors, the beam body will not only undergo expansion and contraction deformation, but also vertical rotation deformation. The traditional comb-type expansion device The combination of fixed comb plate and movable comb plate can meet the longitudinal movement of the bridge, but the vertical rotation of the beam body cannot be used. Once the vertical corner displacement of the beam body occurs, the end of the comb plate will follow the beam. If the body is upturned and upturned, if the vehicle is under heavy pressure at this time, it will cause damage to the entire telescopic device, which will seriously affect the safe passage of the vehicle.

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