Basic Info.
Model NO.
Dimension 100-1000mm
Shape
Rectangle and Circular
Rubber Material
Natural Rubber or Neoprene
Transport Package
in Pallets or Wooden Cases
Specification
As Drawing Requests
Product Description
I
Q:Can you describe about the definition of rubber bearings?
A:
Rubber bearing is the supporting parts to support containers and equipment weight, and fixed on the position, but also bear the operation of vibration and seismic loads. Rubber bearings are made of rubber and thin steel sheets and used for supporting the weight of the bridge. |
II
Q:Can you describe about the rectangular (circular) plate type rubber bearing?
A:
1.Performance:This product is made of multilayer rubber sheets and thin steel inlaid. It has enough vertical stiffness in vertical bearing load,and make the superstructure reaction reliably transfer to the pier, and has good elasticity to adapt to the rotation of the beam end, and has larger shear deformation to meet the horizontal displacement of the superstructure. |
2.Characteristic:This product in the bridge construction, hydropower engineering, earthquake resistant housing facilities has been widely used, compared with the original steel bearing, the advantage of the product is simple structure, convenient installation, steel saving, low price, easy maintenance, easy to change , good isolation effect, and it can reduce the live load and seismic forces to the building of the impact. |
III
Q:Please describe the characteristic about the PTEF plate rubber bearing for me.
A:
This product is in ordinary laminated rubber bearings on the bonding of a thick layer of 1.5-3mm Teflon plate. In addition to vertical stiffness and elastic deformation of ordinary laminated rubber bearing, it afford to vertical load and adapt to the rotation of the beam end, Because of tetrafluoroethylene and low coefficient of friction between the beam bottom of stainless steel plate (mu 0.08 or less) ,it can make the horizontal displacement of the bridge superstructure is not restricted. |
IV
Q: What are the installation details of the rubber bearing ?
A:
1.When using this series of bearings, the bridge girder and bridge pier, the pier bearing part of the concrete grade shall not be less than 300 grade. Special circumstances shall be subject to the consent of the design unit. |
2.Bearing and girder and piers, the pre buried bolt connection, when necessary it can also be with pre embedded steel plate welded connections, but when the bearing and girder and pier pre buried steel plate are welded to prevent overheating of bearing steel body, to avoid burning the silicone and PTFE plate. |
3.Bearing installation elevation should meet the design requirements, to ensure that the bearing surface is aclinic and smooth, the bearing surface four angles of elevation shall not be greater than 2mm. |
4.After bearing approach, check the packing list, including parts list, bearing products certificate, bearing installation and maintenance rules. |
5.Bearing installation should pay attention to the following matters: a.The bearing center line should be parallel to the main beam center line. b.The center line of the movable support on the upper support board and the lower support plate along the bridge direction should be coincident, the angle should not exceed 5 'rad. c.When the bearing is installed, the connecting plate of the upper supper plate and the lower support plate is not loosened to prevent the support from turning over a large angle, and the connecting plate is removed after the beam body is installed, so as to prevent the normal rotation of the beam body. d.Removal of upper and lower support plate, the SX and DX should be installed in a timely manner to install the rubber dust cover. e.Cast in situ concrete beams in the beam body into the whole and remove the connecting plate before the construction of prestressed concrete bridge. f.Before installing coaming, use cotton silk carefully wipe the surface of stainless steel sliding, to prevent dust intrusion PTFE plate surface. |
6.During the use of the bearing, an inspection and maintenance should be carried out regularly every year: a.Check whether the bearing bolt is cut and bearing rubber seal has chap and aging. b.Check whether the relative displacement of the bearing is uniform and record the displacement value of the support one by one. c.Remove debris and dust near the mount and use the cotton yarn to clean the dust on the stainless steel surface. d.Anchor bolt nut loosen a nut to cleaning oil, to prevent rusting, and then tighten. e.Check and fixed point of checking bearing height change, in order to check the bearing cohesion four fluorine plate of the situation. When the bearing changes more than 3mm, remove the rubber sealing ring and check the situation of PTFE. f.Paint rust proof (other than stainless steel sliding surface) on bearing steel. |
V
Q:What is the implementation standards of the rubber bearing?
A:The following are the implementation standards of the rubber bearing
Highway industry standard:JT/T4-2004 highway bridge plate type rubber bearing
Railway industry standard: 1893-2006 TB/T railway bridge plate type rubber bearing
National standard: 20668.4-2007 GB rubber bearings fourth parts: ordinary rubber bearings
VI
Q:What the Scope of application of plate type rubber bearing?
A:
Ordinary laminated rubber bearing apply to the span of less than 30m, small amount of displacement of the bridge.The different plane shapes are applicable to different bridge span structure, the quadrature bridge with rectangular bearings, curved bridge, skew bridge and a cylindrical stone bridge with circular bearings. |
PTFE laminated rubber bearing apply to large span and multi span continuous, simply supported continuous plate structure of large scale displacement of bridge, it can also be used for continuous beam top to spread T type beam traverse slider, rectangular, circle. Application of PTFE laminated rubber bearings are same with the rectangular, circular normal rubber bearing . |
Design parameters of plate type rubber bearing
Allowable average compressive stress [σ](MPa) | Allowable shear modulus of elasticity [G](MPa) | Anti sliding minimum pressure σmin(MPa) | The rubber sheet allows the shear angle tangent value tgσ | The tangent angle allowable value tgθ | The friction coefficient of pure PTFE plate and stainless steel plate. μ |
Rectangular bearing | Circular bearing | Bearing and concrete contact | Bearing and plate contact | Without motive power | Meter power | Reinforced concrete bridge | steel bridge |
10.0 | 12.5 | 1.0 | 2.6 | 3.85 | 0.5 | 0.7 | | | 0.06 |
Note: when the temperature is below - 30 DEG C, shear modulus G value should be increased by 20%, PTFE sliding plate and stainless steel plate friction coefficient should be increased by 30%, without grease lubrication, friction coefficient mu double. |
Mechanical properties of plate type rubber bearing
Item | Index |
Rectangular bearing | Circular bearing |
Ultimate compressive strength Ru (Mpa) | ≥70 | ≥75 |
Compressive modulus of elasticity E (Mpa) | [E]±[E]×20% | [E]±[E]×20% |
Shear modulus G (Mpa) | [G]±[G]×20% | [G]±[G]×20% |
The rubber sheet allowable shear tangent alpha TG | ≥0.7 | ≥0.7 |
Friction coefficient of bearing and concrete surface | ≥0.3 | ≥0.3 |
Friction coefficient of bearing and steel plate | ≥0.2 | ≥0.2 |
The friction coefficient of PTFE plate and stainless steel plate (add grease when). | Bearing compressive stress 7MPa | ≤0.08 | ≤0.08 |
Bearing compressive stress 10MPa | ≤0.06 | ≤0.06 |
Minimum allowable angle tangent value of theta TG | Reinforced concrete bridge | ≥1/300 | ≥1/300 |
steel bridge | ≥1/500 | ≥1/500 |
Contact information
Sales Manager: Miss Joyce
Mobile Phone: +86-15233296877
Tel: 86-318-5106277
Fax: 86-0318-5106277
Website: prolianz-com.en.made-in-china.com
Company: Hengshui Jianfeng Engineering Rubber Co., LTD.
Address:
No. 1657 Renmin Road, Hengshui, Hebei
Business Type:
Manufacturer/Factory, Trading Company
Business Range:
Chemicals, Construction & Decoration
Management System Certification:
ISO 9001, ISO 9000
Company Introduction:
Hengshui Jianfeng Engineering Rubber Co., Ltd., a professional manufacturer
Of rubber product, built in the year 1999, Located in the North of China. Our
Main products include: Bridge bearing series, rubber water stop series, bridge
Expansion jont series, high-pressure rubber hose series, inflatable rubber
Pipe plugs, inflatable rubber dam, inflatable rubber mandrel for culvert concrete
Formwork, polysulphide sealant, etc. Its annual production capacity is about
10000 tons.
They are mainly used in water conservancy, electric power, environmental
Protection, ore smelting, machinery, municipal, transportation, airports, ports,
Stadiums, gardening and irrigation infrastructure industry. Our company′s
Operating philosophy is " Work once, Trust all lives ", relying on excellent
Technology, high quality products and excellent service to get the user′s
Consistent high praise.
Our company established and improved the quality management system in
According to the ISO9001 international quality system, it owned perfect testing and
Production equipment, it has passed the ISO9001: 2008, 14001: 200418001-2001
Certification, The first batch of hygiene license of aquatic products, CRCC Railway
Certification, new high-tech enterprise, a famous brand in hebei province.
Our Company products have been used for eastern route of South-to-North water
Diversion ---- Dhi flat main canal inverted siphon project, the center line of danjiangkou
Dam project, the caohe aqueduct project of the Beijing - shi jia zhuang, liaoning
Dahuofang diversion project, the railway should million tunnel, the railway of fu zhou,
Long Sha railway, wuhan-guangzhou passenger dedicated line, zheng west passenger
Dedicated line, the qinghai-tibet railway company, second-line, prospective new railway
And hangzhou metro line 1, LAN zhou - chongqing railway, Shandong haiyang nuclear
Power project, rongcheng shidao bay nuclear power project, the project of south-to-north
Water transfer in yellow, ye county, treasure Jia, WenBo, tao bifurcation hub twenty
Blocks, etc, The south-to-north water diversion project, the turbulent river aqueduct,
Shahe aqueduct, double Ji river aqueduct, li river aqueduct Ming river aqueduct, ji river
Aqueduct, Mang NiuHe aqueduct, noon river aqueduct, FuYang river aqueduct, choose
The patent product of company ---replaceable type water stop and other national key
Project.