board type PTFE slide rubber bearings

Due to the low friction modulus between PTFE plate and stainless steel, it can skid freely on the bottom of the bridge stainless

codes of PTFE slide plate-type elastometic bearing:GJZF4 for rectangular type and GYXF4 for circular type.In plate bearing surface adhesion a layer of 1.5mm-3mm PTFE can make it.In addition to vertical stiffness ,elastic deformation, bear vertical load and adapt to the girder movement that a common slab rubber bearing has,it takes the advantage of low friction coefficient(u=<0.08) between PTPE and the stainless steel in the bottom of the girder, makes the bridge superstructure's horizontal displacement unrestricted.

Installation2.1 preparations for Installation2.1.1 It is recommended that a pad stone be placed under the pot bearing,with hotes preset in accordance wit the space between the anchor bolts,and the specification of the picket.The pad stone shall have a surface flat and smooth.The level at the top of the pad stone shall include the thickness of the epoxy mortar under the preset bearing base plate.The pad stone outside the base plate shall be made into a graded surface for fear of dead water.2.1.2 The packing shall not be opened until installation of the bearing,and it shall be checked up for each part ogainst the packing list.Prior to installation,the bearing shall not be dismantled without relevant approval.2.2 Procedure and Instructions for Installation2.2.1 Mark the centerline at the design position of the bearing, and also at its top and bottom plates.2.2.2 Put the anchor bolt through the hole in the bottom or top plate and turn it into the picket.Between the bottom plate and the picket place the rubber gasket whose diameter is slightly larger than of the picket.2.2.3 Once the bearing is in place,centered and leveled,fill up the anchor bolt hole and the padding layer of the bottom plate with epoxy mortar or high grade cement mortar. After the mortar is set hard,remove the pad used for adjusting the level of the bearing,and fill up the space left by the removed pad. Epoxy grouting shall be compact and solid.2.2.4 For the bearing is welded to the structure,steel Plates shall be embedded in advance at the top and bottom plates of the bearing.Once in place,the bearing shall be welded intermittently.Care shall be taken during welding to protect the rubger and PTFE plates against any possible damage caused by overheat.The welded part shall be treated againt rust.2.2.5 If the pot bearing is used on the T-beam,temporary support shall be provided at the end of the beam during installation to prevent it from leaning,which shall not be removed until the diaphragm between two T-beams is welded into a whole structure.2.2.6 Once the sliding bearing is unpacked,measures shall be taken to protect the PTFE and stainless steel plates against any scratching or dirt sticking to their surface,and it shall be checked up whether 5201-2 silicone grease is filled up.2.2.7 The centerline of the bearing shall overlap or in parallel to that of the main beam.During installation of the sliding guided bearing,the upper and lower guide blocks shall keep in parallel,and the crossing angle shall not be greater than 5’.2.2.8 When the temporary anchor device is cut for shifting the system of a continuous beam bridge,measures shall be taken to keep the heat from damaging the rubger and PTFE plates.

board type PTFE slide rubber bearings