An expansion joint device for bridges

Abstract

The invention discloses an expansion and contraction joint for a bridge. The expansion and contraction joint comprises a force transfer device, a hydraulic cylinder and a connecting device, wherein the connecting device is positioned on the hydraulic cylinder, the force transfer device is positioned on the connecting device and adopts a force transfer block body (1), the cross section shape of the force transfer block body (1) is a reverse right-angle trapezoidal shape, the force transfer block body (1) is of a hexahedron structure, and comprises a located plane of a right-angle waist, a located plane of an inclined edge, an upper bottom surface, a lower bottom surface, a front surface and a back surface, the located plane of the inclined edge is a work surface, the connecting device adopts a pad block (2), the hydraulic cylinder comprises a hydraulic container (3) and a piston (4), the hydraulic container (3) is a container with an opening at the upper part, the piston (4) is arranged at the opening part of the hydraulic container (3), and the inside of a cavity defined by the hydraulic container (3) and the piston (4) is filled with pressure bearing liquid. The expansion and contraction joint has the advantages that the manufacturing is simple and convenient, the structure is firm and reliable, and the safety is high.

Description

Technical field [0001] The invention belongs to the field of construction technology, and relates to a bridge protection device, in particular to an expansion joint device for bridges. Background technique [0002] With the development of social economy, with the application of high-strength materials, novel structural systems, new construction techniques and modern structural analysis methods, pedestrian bridges are developing in the direction of light weight, large span, and flexibility. At the same time, the structural form of pedestrian bridges It is also becoming more and more diverse. Pedestrian bridges in the form of flat arches have become a relatively common form of pedestrian bridges. Under the action of vertical forces, the arch foot supports will bear a large horizontal load, which also brings about the design of the support. difficult. The large-scale bridge supports used in suspension bridges and cable-stayed bridges can meet the requirements of flat-arch pedestria...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an expansion joint device for bridges, which can transfer the excess horizontal load of the pedestrian bridge to the abutment, so as to solve the problem that the excessive horizontal thrust of the flat-arch pedestrian bridge is all applied to the bridge support. The problem of having to use large bridge supports, and at the same time overcome the possible problems caused by the expansion and contraction of the beam body caused by the temperature rise and fall

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