High Quality Reinforced Sliding Rubber Bearing Pad to Kenya

Contact information
Sales Manager:       Miss lurywen
Mobile Phone:         +86-13323183257
Tel:                              86-318-5106277
Fax:                             86-0318-5106277   
Website:                   *
Company:                 Hengshui Jianfeng Engineering Rubber co., LTD.
 Rubber bearing is composed of multilayer thin plate with rubber vulcanization glue them into a common rubber bearing products, this product has enough vertical stiffness, to be able to support reaction force of upper structure reliable transfer to pier, bearing has good elasticity, in response to the rotation of bridge beam end;It also has a large shear deformation ability to meet the horizontal displacement of the superstructure.
The current standard of rubber support for this product is the following three:
Highway industry standard: JT/t4-2004 road bridge plate rubber bearing
Railway industry standard: TB/T 1893-2006 railway bridge plate rubber bearing
National standard: GB 20668.4-2007 rubber bearing part 4: general rubber bearing
Rubber bearings have the characteristics of simple construction, convenient installation, low cost, low price, easy maintenance and easy replacement.
In plate bearing surface sticky after a 1.5 mm - 3 mm thick layer of teflon plate, can be made into ptfe sliding plate rubber support it in addition to the vertical stiffness and elastic deformation, can withstand the vertical load and to adapt to the beam end rotation, due to the low friction coefficient of ptfe plate, can make the beam end in four fluorine board free sliding surface, the horizontal displacement is not restricted, especially suitable for medium, xiao-he load, the displacement of the large bridge.
The plate rubber bearing is a common product in the small and medium bridge of the highway. It is divided into ordinary plate rubber bearings and four-flur-plate rubber bearings.For the common bridge support, it is suitable for Bridges with a span of less than 30m and a smaller displacement. Different plane shapes are suitable for different Bridges and structures, and rectangular supports are used for orthogonal Bridges.Curved bridge, skew bridge and cylindrical pier bridge with round bearing.
Bearing installation
A: installation preparation
A. 1 plate rubber bearing installation area should set bearing pad stone, stone bearing pad print size should be according to calculate and determine the local pressure, cushion stone length, width should be more than bearing the size of the corresponding at least 50 mm or so, its height should be more than 100 mm, and should be considered to facilitate the installation position of bearing replacing roof beam jack.
A. two working bearing pad stone mat reinforcement, reinforcement of 8 mm diameter, spacing appropriate x 50 mm to 50 mm, bridge pier, Taiwan should be within the vertical bar extends to the bearing pad in the stone, bearing pad stone should not be below the C30 strength grade of concrete.
A. 3 pedestal pads should be flat, clean, dry and free of sand.The elevation of the support pad is accurate and accurate.Under the condition of flat slope, with a piece of stone and bearing pad on both ends of the beam the same bridge piers, bearing pad on stone should be in the same elevation plane design, the relative elevation difference should not be more than + / - 1.5 mm, the same bearing pad stone elevation difference should be less than 0.5 mm.
B: support installation
B. After the entry of the support, check whether there is a manufacturer's trademark or permanent mark on the support.At the time of installation, the center line of the support position shall be marked on the support pad stone and support base in accordance with the requirements of the design drawing to ensure that the support base is in place.
B. 2. When mounting, it should prevent deflection or excessive initial shear deformation.After the installation is completed, the support must be kept in close contact with the upper and lower structures.Heavy vehicles should be avoided if the overall beam structure is not formed.
B. 3 bridge pier design should consider the need for support maintenance and replacement.In any case, two or more supports are not allowed to be installed side by side in the same support point along the longitudinal center line of the beam;In the same beam (plate), the horizontal unfavorable setting more than two supports;Support for different specifications should not be installed side by side.
B. 4 bearings after installation, should be comprehensive check for leakage bearing, bearing installation direction and position (contact with the embedded steel plate, bearing the centerline location), the bearing specifications to see if there is wrong, temporary fixed facilities is demolished, four fluorine skateboard bearing whether injection silicon fat (do not use oil instead of silicone fat) wait for a phenomenon, once found, should timely adjust and processing, to ensure the normal work of the bearings after installation, after the installation of the deviation and record pedestal and anomalies.
B. The average compressive stress of 5 supports is 10MPa.The volume of rubber elastomers is equal to 2000MPa.
Friction coefficient mu =0.3 during contact with concrete;When contact with steel plate, friction coefficient mu = 0.2;Teflon plate in contact with the stainless steel plate (add silicon grease) u f = 0.06, the friction coefficient when the temperature below 25 ℃, u f value increased by 30%, when not silicone, u f value should be doubled.
B. 6 rectangular support installation with short side size and bridge to place.
Construction precautions: keep the top surface of the padded stone top clean.If the height difference of the supporting pad exceeds the standard, it must be adjusted with cement mortar.The center of the rubber support base is fitted to the center line of the supporting pad to ensure that the support is in place.Placed on the bearing in the casting beam devices for a slightly bigger than a bearing surface of bearing plate, sheet metal welding anchor reinforcement and the beam body connection, and the supporting steel plate as a part of pouring concrete beam template, according to the above method, can make the pedestal and beam bottom plate and cushion stone all top secret.Of the prefabricated rubber bearing installation: installed the prefabricated rubber bearing is the key to ensure the bottom of the beam at the top of the cushion stone surface parallel, level off, make its and bearing surface of the upper and lower dense paste, all may not appear bias, escapes and uneven phenomenon of tolerance.The construction procedure is as follows: to handle the support pad stone, to make the support pad stone.The base of the prefabricated beam and the bearing contact should be kept horizontal and flat.When there is a honeycomb pulp and inclination, the cement mortar should be used to tamper with the solid.
The correct position of the rubber bearings is to make the support and support stone in place accurately.When the beam falls, the longitudinal axis of the T beam should coincide with the center line of the support center.The longitudinal axis of plate beam and box girder is parallel to the center line of support.For beam accurate, in the first plate beam or box girder frame, can be in two beam bottom row bearing the cross position of the center, in the end of the beam is marked two facades lead straight line bearing the location of the center line, when beam to that of the pier on the location of the center line of collocated.The number of subsequent crosses can be based on the first cross beam.It is necessary to smooth the beam on the beam and prevent the pressure deviation or initial shear deformation. You can refer to the railway bridge plate rubber support specification table.When installing a T bridge, if the beam reinforced bottom width than rubber bearing, should be set up between the bearing and the bottom of the beam reinforcement than bearing large reinforced concrete block or thick plate transition layer, in order to avoid local compression bearing, and form stress concentration.The reinforced concrete pad or thick steel plate shall be bonded with epoxy resin mortar and beam.After the falling beam, the upper surface of the rubber support and the horizontal surface of the beam are generally kept.The prestressed simple support beam can be tilted at the top of the pedestal.The top side of the non-prestressed beam can be slightly tilted forward, but the tilt Angle must not exceed 5.
Maintenance maintenance
1) the plate rubber bearings shall be regularly maintained and maintained for inspection and shall be repaired or replaced in time once the problems are found.
2) the rubber bearings of plate rubber and teflon should check the following contents:
A: whether there is slippage and unseating in the support base;
B: bearing shear displacement is too large (shear Angle should be not more than 35 ®);
C: whether the pedestal can produce too much compression deformation;(maximum compression deformation should not exceed 0.07te, te is the total thickness of rubber layer in support)
D: whether the protection layer of the support is cracked or hardened, and records the position of the crack, the width and length of the cracks;
E: whether the external convex plates of rubber plates are uniform and normal between different layers of support plates;
F: the four fluorine skateboarding rubber bearing, should check bearing above a layer of teflon board are in good condition, with or without stripping phenomenon, slip out of the bearing is bearing the top surface of stainless steel plate, 5201-2 put whether silicone coating and filled with four fluorine skateboarding rubber bearing oil storage pit.
3) the branches shall be kept intact and clean.Remove debris around the support area in time, remove snow and ice in winter, and ensure proper support.At the same time, it is necessary to clean the water frequently, remove the water from the top of the pier, and prevent the rubber support from touching the grease, and wash the remaining oil on the bottom and the pier and the top of the platform.Prevention of rubber aging, deterioration and loss of function.
2.4.4 the beam bearing pressure is not uniform, and the support should be adjusted when it is out of air or large compression deformation.
2.4.5 the plate rubber bearings should be replaced in time when they are too large shear deformation, aging, cracking and so on.,
2.4.6 on the four-fluorine slide rubber bearing, if the four-fluorine board and the stainless steel plate contact between the contact surface, it is necessary to clean the sand or the silicon oil when it dries up, and inject the new silicone oil.
For tetrafluoroethylene plate rubber bearing is suitable for large span, the multi-span continuous beam, continuous slab bridge structures such as large displacement. It also can be used as a continuous beam top slider of generalized T beam transverse. Rectangle, round four fluorine plate rubber bearing applications respectively with rectangular, circular ordinary plate rubber bearing the same.