A Surface Seamless Bridge Expansion Joint

Abstract

The invention belongs to the technical field of road and bridge engineering, and relates to a surface seamless type bridge expansion joint. The surface seamless type bridge expansion joint is characterized in that lower sliding plate blocks are fixed to the tops of two cement main beams through anchoring devices respectively, elastic deformation bodies are arranged at the two ends of a bearing plate, one end of each elastic deformation body is fixedly connected with the bearing plate, the other ends of the elastic deformation bodies are fixedly connected with connecting steel bars reserved on the main beams, sliding shafts are arranged between the tops of the two cement main beams and the bearing plate, lubricant grooves are formed in the contact faces of the lower sliding plate blocks and the bearing plate, antiskid grooves are formed in the contact face of the bearing plate and a bridge deck pavement layer, and a limiting check block is fixed to the middle of the lower portion of the bearing plate. The surface seamless type bridge expansion joint has the advantages that telescopic deformation of a bridge is mainly completed below the bearing plate and on the elastic deformation bodies and the bridge deck pavement layer, due to the fact that the surface of the bridge expansion joint has no seam, running comfort is improved, the impact action of running loads to the bridge is weakened, the constriction period is short, the maintenance and replacement time of the expansion joint is shortened, bridge deck maintenance and pavement layer modification are facilitated, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of road and bridge engineering. Background technique [0002] Because the bridge is affected by temperature changes or vehicle loads, the concrete beams will be thermally expanded and contracted. A deformable device, that is, an expansion joint, is provided between the ends of two adjacent beams or between the beam and the back wall of the abutment. [0003] In 2012, the mileage of national grade roads was 3.6096 million kilometers, and grade roads accounted for 85.2% of the total road mileage. Among them, the mileage of secondary and above roads was 501,900 kilometers. Among them, there are 2,688 super-large bridges with a length of 4.6886 million meters, and 61,735 large bridges with a length of 15.1816 million meters. At present, the main types of bridge expansion joints used at home and abroad: 1) Galvanized sheet steel expansion joints. On prefabricated simply supported beam bridges with small and me...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a surface seamless bridge expansion joint, which can solve the problems of driving comfort in bridge expansion joints and short service life of bridges due to expansion joints.

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