Ruida rubber is the first choice of basin rubber bearing with good quality and national standard

  Pot type rubber bearing GPZ (Ⅱ) pot type bearing is a new type of bridge bearing composed of steel components and rubber
Compared with other similar types of pot type bearing and cast steel roller shaft bearing, it has the characteristics of large bearing capacity, large horizontal displacement, flexible rotation, light weight, compact structure, simple structure, low building height, convenient processing and manufacturing and steel saving, The basin rubber bearing is an ideal bearing suitable for large collapse bridges
At present, the bearing capacity of this series of bearings is 31 levels, with a bearing capacity of 0
8mn-60mn, which can meet the needs of large bridge construction
In this standard series, the horizontal bearing capacity of the fixed bearing in all directions and the non sliding direction of the unidirectional movable bearing shall not be less than 10% of the rigid bearing capacity of the bearing
The horizontal bearing capacity of seismic bearing shall not be less than 20% of the rigid bearing capacity of the bearing
The rotation angle of the support shall not be less than 0
02rad After lubrication with 5201 silicone grease, the minimum design friction coefficient of normal temperature movable bearing is 0
03 After lubrication with 5201 silicone grease, the minimum design friction coefficient of cold resistant movable bearing is 0
06

Performance and classification of pot type rubber bearings
a
Bidirectional movable bearing: it has the performance of vertical rotation and longitudinal and transverse sliding, code named SX

b
Unidirectional movable support: it has the performance of vertical rotation and single direction sliding, code named DX

c
Fixed support: it only has vertical rotation performance, code GD

Applicable temperature range
a
Normal temperature bearing: applicable to - 25 ℃ ~+ 60 ℃
b
Cold resistant bearing: applicable to dry - 40 ℃ ~+ 60 ℃ ， Code F

Precautions for pot type rubber bearing
1
It is recommended to set bearing pad stones on the top of piers and abutments
2
Before the installation of basin support, the box shall be unpacked for comprehensive inspection and cleaning
Remove the oil stain, especially the relative sliding surface between stainless steel and filled PTFE plate shall be carefully scrubbed with acetone or alcohol
Other parts of the support shall also be scrubbed, and anti rust oil shall not be applied in the support
3
In addition to the elevation of the bearing must meet the design requirements, in order to ensure the service performance of the bearing, the plane level in three directions must be ensured
4
The upper and lower parts of the support must be aligned vertically and horizontally, or because the temperature during installation is different from the design temperature, the staggered distance between the upper and lower parts of the support must be equal to the calculated value
5
The center line of the support and the center line of the main beam shall coincide or remain parallel
6
When system conversion is implemented for continuous bridges, thermal insulation measures must be taken between the support and sulfur cement slurry block to avoid damage to the filled tetrafluoroethylene plate and rubber block

 
 
Pot type rubber bearing GPZ (Ⅱ) pot type bearing is a new type of bridge bearing composed of steel components and rubber
Compared with other similar types of pot type bearing and cast steel roller shaft bearing, it has the characteristics of large bearing capacity, large horizontal displacement, flexible rotation, light weight, compact structure, simple structure, low building height, convenient processing and manufacturing and steel saving, The basin rubber bearing is an ideal bearing suitable for large collapse bridges
At present, the bearing capacity of this series of bearings is 31 levels, with a bearing capacity of 0
8mn-60mn, which can meet the needs of large-scale bridge construction

Technical performance of pot type rubber bearing
a
The vertical corner of the support shall not be less than 40

b
The vertical bearing capacity (KN) is 1000-50000, which is divided into 28 levels, and the uneven bearing capacity of non sliding surface is 10% of the vertical

c
Friction coefficient: normal temperature type, &mu& le; 0
04
Cold resistant type &mu& le; zero point zero six
Basin type rubber bearing arrangement
The arrangement of bridge bearings is mainly related to the structural form of the bridge
Generally, the following basic principles need to be considered when arranging the support:
(1) When the superstructure is a spatial structure, the bearing shall be able to adapt to the deformation of the bridge along the bridge direction (x direction) and across the bridge direction (Y direction) at the same time;
(2) The support must be able to reliably transmit vertical and horizontal reaction forces;
(3) The support shall make the longitudinal displacement, transverse displacement and longitudinal and constant rotation angle caused by the deformation of the beam as unconstrained as possible;
(4) Railway bridges usually must set a fixed bearing on each coupling beam body;
(5) When the bridge is located on the ramp, the fixed bearing shall generally be set on the abutment in the downhill direction;
(6) When the bridge is on a flat slope, the fixed bearing should be set on the front abutment in the main driving direction;
(7) The fixed bearing should be set at the place with large bearing reaction;
(8) Several bearings on the same pier shall have similar rotational stiffness;
(9) When the bearing settlement of continuous beam may occur, the possibility of manufacturing height adjustment shall be considered

In short, the layout principle of bridge bearings is not only to facilitate the transmission of bearing reaction, but also to make the bearings fully adapt to the free deformation of the beam body