What is the difference between plate type rubber bearings and pot type bearings?
Feb 15,2025
Plate type rubber bearings and bowl type bearings are currently two widely used bridge bearings. Usage: This product is mainly suitable for highway bridges, railway bridges, and urban overpasses.
Rubber bearings are suitable for bridges with conventional spans, and their bearing capacity is relatively small; And it is required that the longitudinal and transverse displacement of the bridge be relatively small, and there is no requirement for fixed support points. The support is located at an important position at the junction of the upper and lower structures of the bridge, and its reliability directly affects the safety and durability of the bridge structure. Its installation and construction methods, as well as its location at the junction of the upper and lower structures of the bridge, directly affect the safety and durability of the bridge structure.
For the installation of plate rubber bearings, in order to ensure the quality of engineering installation and facilitate the installation, adjustment, and replacement of bearings, whether using cast-in-place beam method or prefabricated beam method for construction, and regardless of the specifications and types of bearings used, support pads must be installed at the top of the pier.
Basin type bearings are mainly used in some special structures of bridges (such as curved bridges, inclined bridges, high pier bridges, etc.) and large bridges, suitable for situations where the longitudinal and transverse displacement of the bridge is relatively large, and fixed bearings can also be set up. For the installation steps of supports for cast-in-place beams, sleeve holes should be reserved on the support pad stones of the bridge piers. The size of the holes should be two to three times the diameter of the sleeve, and try to be slightly larger than the length of the sleeve. Mark the centerline of the support position of the Baozheng bridge pier support pad according to the design drawing.
Its top and bottom plates are leveled, and for the movable support, a certain displacement is pre-set according to the temperature during installation, and then firmly connected with four steel plates.
Before installing the bowl shaped support, it should be unpacked for a comprehensive inspection and cleaning. Remove oil stains, especially the relative sliding surface between stainless steel and filled polytetrafluoroethylene plate, which should be carefully cleaned with alcohol. Other components of the support should also be cleaned, and rust proof oil should not be applied inside the support. In addition to meeting the design requirements for elevation, in order to ensure the performance of the support, it is necessary to ensure the horizontal plane in three directions.
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