Extra-large displacement unit type multidirectional displacement comb plate bridge expansion device

Abstract

The invention discloses an extra-large displacement unit type multidirectional displacement comb plate bridge expansion device and belongs to a multidirectional displacement bridge expansion device. The bridge expansion device comprises a movable comb plate and a fixed comb plate, wherein one end of the movable comb plate is connected with an asphalt pavement of a steel box bridge body through a buffer part, the other end of the movable comb plate and one end of the fixed comb plate are mutually staggered and fixed to a bridge deck in a lap-joint mode, and the other end of the fixed comb plate is connected with pavement embedded steel bars through a bracket component. The extra-large displacement unit type multidirectional displacement comb plate bridge expansion device also comprises an installing rack on the steel box bridge body, wherein a displacement damping part is arranged between the installing rack and the movable comb plate. The phenomena such as vehicle skip motions and water leakage at expansion joints are avoided, multidirectional bridge displacement and multidirectional bridge translation are achieved by arranging a displacement part and a buffer part, noise produced when vehicles pass through can be reduced, and meanwhile the cost and working amount required in the links such as installation, maintenance and the like of the expansion device can be effectively simplified.

Description

technical field [0001] The invention belongs to a multi-directional displacement bridge telescopic connection device, in particular to a multi-directional displacement comb-tooth plate bridge telescopic device with a large displacement unit type. Background technique [0002] The expansion device is one of the important functional components of the bridge. By installing the expansion device between the beam end and the beam end of the bridge, and between the beam end and the abutment, it can effectively adjust the load caused by the vehicle, the environmental characteristics and the physical properties of the bridge building materials. Resulting structural displacements and joints. An ideal telescopic device should meet the following conditions: fully meet the displacement of the bridge superstructure under the action of external force; must be firm, reliable and durable; be able to resist mechanical wear and collision; ensure smooth and safe traffic; prevent rainwater and g...

AI Technical Summary

Problems solved by technology

Car jumping and water leakage at the expansion joints have become common phenomena. The grid structure of the modular expansion device falls apart, the center beam steel breaks and falls off, the nuts of the simple comb-tooth plate expansion device fall off, and the comb-tooth plate bends. Instances of security risks are common

According to statistics, at present, 87% of roads and bridges in China have been damaged to varying degrees after two years of opening to traffic.

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