High-Speed Bridges Use Elastic Rubber Bearing Pads

Its function is to fix the superstructure to the pier and abutment, bear various forces acting on the superstructure, so that it can be reliably transmitted to the pier and abutment; under the action of temperature, concrete shrinkage and creep, the support can adapt to the superstructure The rotation angle and displacement of the superstructure can be freely deformed without additional internal force.

The structure of the coaxial support should conform to the theoretical calculation scheme of the upper structure. For example, when the pressure is transmitted through a fixed point, the support should be designed as a fixed support that can only withstand the rotation of the end of the structure and cannot move; When a fixed point is transmitted in a certain direction, it should be designed as a movable support that can both rotate and move. There are three types of beam bridge supports: horizontal two-way fixed bearings (ie fixed bearings), horizontal two-way movable bearings (or weighing) two-way movable bearings), horizontal and one-way fixed and one-way movable bearings (ie, movable bearings). Depends on the axial width. Generally, narrow bridges only require free telescopic movement in the direction of travel. The arrangement of various supports is shown in Figure 1a; in wide bridges, due to the lateral deformation of the upper structure and torsion, it is required to be arranged as shown in Figure 1b.

Railway support

The support is an important force transmission device of the main shaft. In addition to considering its sufficient strength, rigidity and free rotation or movement performance, attention should be paid to replacement, maintenance and replacement in the design. Pay attention to the concrete cushion under the seat plate during construction. It should be flat, and its location should be determined according to the temperature; anti-seismic measures should be considered in the earthquake zone.