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The arrangement of rubber pads
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The arrangement of rubber pads is mainly related to the layout of the bridge. Generally, the following basic principles need to be considered when deploying the supports:
When the upper structure is a spatial structure, the rubber pads should be able to adapt to both the bridge direction (direction) and the cross-bridge direction (direction) of the bridge. ) deformation
The rubber pad must be able to reliably transmit vertical and horizontal reaction forces
The rubber pad should minimize the longitudinal displacement, transverse displacement and longitudinal and constant rotation angles caused by the deformation of the beam. Probably not constrained
When the bridge is located on a flat slope, the solid rubber pads should be placed on the front abutment in the important driving direction
The rubber pads should be placed where there is a large reaction force of the pads< br/> Several rubber pads on the same bridge pier should have similar rotational stiffness
In short, the deployment principle of bridge rubber pads is to facilitate the transmission of support reaction force and to ensure that the rubber pads can fully Comply with the free deformation of the beam body.
Installation of rubber pads
Before installing the pads, the installation position of the support should be measured and checked. The installation plane of the support should be parallel to the sliding plane or rotation plane of the support. Incorrect parallelism is not suitable. Override r.
Before installing the pads, check the relative positions of the top and bottom plates of the movable support.
After the pad is installed, the rotation and sliding planes should be horizontal, and their slope with the theoretical plane should not be greater than r. The center of the upper and lower plates of the support should be aligned, and the fault should not be greater than r.
In order to ensure that the cushion block is placed smoothly, a thick dry-hard non-compression mortar cushion should generally be tamped between the bottom surface of the bearing and the top surface of the professional pad stone.