Rack type bridge with telescopic function and operation method

Abstract

The invention discloses a rack type bridge with a telescopic function and an operation method. The rack type bridge with the telescopic function comprises a cross beam, a middle beam plate is arrangedabove the cross beam, a bridge panel is arranged above the middle beam plate, a first gear and a second gear are separately and fixedly installed to the sides, close to each other, of the middle beamplate and the bridge panel, and the first gear meshes with the second gear. The operation method of the rack type bridge with the telescopic function comprises the following steps that S1, the driving direction of a vehicle is buffered, the vehicle squeezes the bridge panel downward during the driving process of the bridge panel, the bridge panel drives a connecting rod to move downward, and theconnecting rod is located at one end of a cavity to squeeze a first spring. The rack type bridge with the telescopic function has simple structure and stable structure, can buffer the applied force ofdifferent directions in the driving of the vehicle, enables the vehicle to run comfortably and bear less impact force, and prolongs the service life of the bridge.

Description

Technical field [0001] The invention relates to the technical field of bridges, in particular to a rack-type bridge with a telescopic function. Background technique [0002] As the country’s construction scale in the field of highways and bridges gradually increases, large-span bridges are increasing. As a key component of bridges, bridge expansion devices must not only meet the expansion and contraction caused by the temperature change of the bridge superstructure, but also meet the requirements caused by constant and live loads. The need for three-dimensional displacement movement of the beam end, and at the same time, the existing "heavy load, high density" traffic conditions put forward high requirements on the reliability of the use of bridge expansion devices. At present, there are two types of bridge expansion devices: modular expansion devices and comb-type expansion devices, which have their own technical characteristics in terms of structure and function. The modular e...

AI Technical Summary

Problems solved by technology

The modular expansion device has a strong ability to adapt to the three-dimensional deformation of the bridge and a mature structure; however, the vehicle's operating comfort is poor, the impact force is large, and the service life is affected to a certain extent

The comb-type telescopic device runs smoothly and is less impacted; however, it has poor ability to adapt to the three-dimensional deformation of the bridge, and long-term action will cause the fracture of the comb and the damage of the anchoring system, which seriously affects driving safety.

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