Multidirectional displacement composite plate type telescopic device for highway bridge

Abstract

The invention discloses a multidirectional displacement composite plate type telescopic device composed of a displacement device and a fixing plate, wherein one end of the fixing plate is welded to the upper surface of an inner boundary beam of the displacement device in a flush mode; a force transmission fulcrum is formed on the inner side of the fixing plate through a supporting block; a polytetrafluoroethylene plate on the upper surface of the supporting block and the fixing plate form a sliding supporting point; the other side of the fixing plate is connected with a bridge floor through bolts on an anchoring assembly; the anchoring assembly is composed of an anchoring box body, a pressing rubber block and connecting bolts; the fixing plate is embedded into the anchoring box body through a boss at the bottom; and the bottom of the boss and the pressing rubber block form pre-tightening force when the bolts are fastened. The displacement device is composed of beam bodies, connecting frames, pressing beams, pressing supports, slideways and pressing bolts, the side beams and the middle beam are pressed on the slideway through the connecting frames and the pressing supports of the side beams and the middle beam, the beams slide through a sliding face formed by the pressing supports, the contact faces of the pressing beams and the slideway, and the telescopic displacement requirement is met.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, in particular to a multi-directional displacement composite plate expansion device for highway bridges. Background technique [0002] At present, the expansion devices used in highway bridges are divided into two structural forms: modular type and comb type plate. The structure of the modular telescopic device is mainly composed of load-bearing parts, support parts and adjustment members. The load-bearing parts withstand the rolling of vehicles and are composed of special steel and sealing strips. The support part consists of support beams, rubber bearings and support boxes under the load-bearing parts. Composition, to bear the load transmission of the vehicle, the adjustment member uses the spring shearing force installed vertically or the polyurethane spring pressing force installed horizontally to adjust the displacement uniformity of each beam of the bearing part. This technology p...

AI Technical Summary

Problems solved by technology

Due to its unique shallow installation depth, good surface smoothness, and comfortable driving, comb-type expansion joints are widely used in domestic highway bridges, but due to the congenital thin anchorage system, the service life is not long, and the male and female teeth used at the same time are limited. The lateral displacement of the bridge has been reduced. In practical applications, it has been found that there are many phenomena of jamming, broken teeth, and loose and falling steel plates, which seriously affect the service life and traffic safety.

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