GYZ450X99 Circular Elastomeric Bearing Pad Processing Manufacturer for Bridge Bearings

Elastomeric bearing pads are commonly used products in small and medium-sized highway bridges. They are divided into ordinary elastomeric bearing pads and polytetrafluoroethylene (PTFE) sliding bearing pads. Ordinary bridge bearings are suitable for bridges with spans less than 30m and small displacement. Different planar shapes are suitable for different bridge span structures: rectangular bearings are used for orthogonal bridges, while circular bearings are used for curved bridges, skew bridges, and cylindrical pier bridges.

PTFE sliding bearing pads are suitable for bridges with large displacements, such as long-span, multi-span continuous, and simply supported beam continuous slab structures. They can also be used as sliding blocks in the incremental launching of continuous beams and the transverse shifting of T-beams. The application of rectangular and circular PTFE sliding bearing pads is the same as that of ordinary rectangular and circular elastomeric bearing pads, respectively.

a: Review the installation construction drawings of elastomeric bearing pads, paying special attention to the main technical parameters such as the model GYZ450X99 Circular Elastomeric Bearing Pad Processing Manufacturer for Bridge Bearings, height, and load-bearing capacity. For PTFE sliding bearing pads, also note the size, installation position, and direction of the embedded steel plate; b: When selecting elastomeric bearing pads, the maximum load-bearing capacity of the bearing should match the support reaction force of the bridge, with an allowable deviation range of ±10%;

c: For curved, sloped, skewed, or wide bridges, circular elastomeric bearing pads should be selected. Highway bridge engineering must not use rubber bearings with spherical crowns or slopes;

d: When the longitudinal slope of the bridge is not greater than 1%, elastomeric bearing pads can be directly installed on the piers and abutments, but the required thickness due to the influence of the longitudinal slope should be considered. When the longitudinal slope is greater than 1%, measures such as embedded steel plates (with wedge-shaped steel plates), concrete pads (with sloped bedding stones), or other methods should be used to level the beam bottom and ensure the bearing is placed flat GYZ450X99 Circular Elastomeric Bearing Pad Processing Manufacturer for Bridge Bearings. Elastomeric bearing pads should be checked according to the relevant provisions of JTG D62 and can only be used after meeting the specified requirements.

e: GJZF4 and GYZF4 PTFE sliding bearing pads should be installed horizontally. Upper and lower steel plates must be installed GYZ450X99 Circular Elastomeric Bearing Pad Processing Manufacturer for Bridge Bearings, and 5201-2 silicone grease lubricant should be applied between the PTFE sliding plate and the stainless steel plate. Dust covers must be installed after installation; the PTFE sliding plate of the bearing must not be placed on the bottom surface of the bearing, and the stainless steel plate in contact with the PTFE sliding plate must not be installed on the bridge pier or abutment bedding stones.