Description

Bridge expansion joint: refers to the expansion joint is usually set up between the two beam ends, between the beam end and the abutment or on the hinge position of the bridge in order to meet the requirements of the bridge deck deformation. The expansion joint is required to be parallel and perpendicular to the axis of the bridge in two directions, which can be freely telescopic, firm and reliable, and the vehicle should be smooth, without jump and noise; Should be able to prevent rain and garbage dirt infiltration blocking; Installation, inspection, maintenance and elimination of dirt should be simple and convenient. In setting the expansion joint, the railing and bridge deck pavement should be disconnected.

The function of the bridge expansion joint is to adjust the displacement and connection between the superstructure caused by the vehicle load and the bridge construction materials. Once the expansion device of the skew bridge is damaged, it will seriously affect the speed, comfort and safety of the driving, and even cause the driving safety accident.

Bridge expansion joints generally have butt type, steel support type, combined shear type (plate), modulus support type and elastic device