Hengshui Kaixiang Rubber Products Co., Ltd.

Hengshui Kaixiang Rubber Products Co., Ltd. is a professional manufacturer of bridge bearings, rubber bearings, grid supports, bridge expansion joints,
The following is a detailed introduction to the links and correct placement of bridge bearings.
Bridge bearings are important structural components connecting the upper structure and lower structure of the bridge. It can reliably transmit the reaction force, deformation displacement and rotation angle of the bridge superstructure to the bridge substructure, so that the actual stress situation of the structure is consistent with the calculated theoretical diagram. A bridge bearing device erected on a pier, with the top surface supporting the bridge superstructure. Its function is to fix the superstructure to the pier, bear various forces acting on the superstructure, and reliably transmit them to the pier. Under the action of load temperature, concrete shrinkage and creep, the bearing can adapt to The upper structure's rotation angle and displacement allow the upper structure to deform freely without generating additional additional internal forces.
The structure of the bridge support should comply with the theoretical calculation diagram of the superstructure. If the support pressure is transmitted through a fixed point, the support should be designed to be
fixed and can only allow the end of the structure to rotate but not move. If the support supports pressure transmitted through a fixed point and acts 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 supports, that is, fixed supports, horizontal two-way
movable supports, or two-way movable supports, horizontal one-way fixed supports, and one-way movable supports, which are movable supports. Their layout is based on the bridge
> Depends on width. In narrow bridges, it is generally only required to move freely along the driving direction. In wide bridges, since the lateral deformation of the superstructure is also large,
layout is required.
The correct positioning of the bridge supports must first ensure that the bridge supports and supporting pads are accurately positioned according to the design requirements. When erecting and lowering beams, the longitudinal axis of the profile beam should coincide with the center line of the support. The longitudinal axis of the plate girder and box beam should be parallel to the center line of the support. In order to accurately drop the beam, when erecting the first span plate beam or box beam,
the center of the cross position of the two supports can be marked on the bottom of the beam, and the two supports can be marked on the end elevation of the beam. The plumb line of the position centerline should coincide with the position centerline of the pier when the beam is dropped. The next few spans can be carried out based on the first span beam. When erecting and lowering the beam, it must be stable to prevent
pressure deflection or initial shear deformation. You can refer to the railway bridge plate rubber bearing specification table
.
When installing bridge supports, if the rubber bearing is wider than the bottom of the beam reinforcement, a reinforced concrete pad larger than the support should be added between the support and the bottom of the beam reinforcement
Blocks or thick steel plates should be used as transition layers to prevent local pressure on the supports and stress concentration. Reinforced concrete pads or thick steel plates should be bonded to the bottom of the beam bars with epoxy resin mortar. After the beam is lowered,
generally the top surface of the support and the beam surface remain level. For prestressed simply supported beams, the top surface of the support can be tilted later. For non-prestressed beams, the top surface of the support can be slightly tilted forward, but the inclination angle must not exceed. The pier beams with plate rubber bearings should be made at the construction site using metal wires instead of tie rods. The surface in contact with the concrete should be flat and smooth.
Hengshui Kaixiang Rubber Products Co., Ltd.
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Address Hebei Province Beitian Village, Pengdu Township, Binhu New District, Hengshui