Railway Bridge Bearing

1.The Introduction of railway bearing:

        BL general bridge bearing is sulfurized and stuck together by several layers of rubber sheer and thin steel plate.
It has sufficient vertical rigidity, and can reliably transfer the counterforce on the upper structures to pier platform; it has
fine elasticity, and can adapt to the rotation of beam end; it has great shearing deformation capacity, and can satisfy
the horizontal displacement of upper structures.

     a.The bearing is classified as three types:

      sliding guided type, free sliding bearing and fixed type.Dimensions and weights for deviating permissible concrete pressures and unusual loadconditions will be calculated on request. Depending on the area of application and country requirements pot bearings can be supplied in accordance with various

standards.

    b.The three executive standards of the products at persent:

    The standard of Righway industry: JT/T4-2004 Plate type rubber bearing of highway bridges

The standard of Railway industry: TB/T 1893-2006 Plate type rubber bearing of railway bridges

National standard : GB 20668.4-2007 Plate type rubber bearing The forth part: General plate type rubber bearing

2.Applicability of Railway bridge bearing:

      1. Railway bridge bearing suits to bridges with span less than 30m and small displacement. Different flat shape suits to different bridge span structures: orthogonal bridges adopt rectangular bearing; curvilinear bridges, obique crossing bridges and cylindrical pier bridges adopt circular bearing.

      2 .Tetrafluoro Railway bridge bearing suits to bridges with large span, several spans in continuous, with simply
supported beam and continuous plates strutures, and large displacement. It can still be used as the sliding block in pushing
of continuous beam and cross sliding of T-shaped beam. The application of rectangular and circular tetrafloro Adjustable bearing are the same with rectangular and circular general Bridge Bearing ,separately.