Pot Bearing

◆◆ Classification and Models of Pot Rubber Bearings
1. Classification by Displacement Type
There are three categories: bidirectional movable bearings, unidirectional movable bearings, and fixed bearings.
- Bidirectional movable bearings: Coded as SX, they have the performance of vertical rotation and longitudinal and transverse sliding.
- Unidirectional movable bearings: Coded as DX, they have the performance of vertical rotation and sliding in a single direction.
- Fixed bearings: Coded as GD, they only have the performance of vertical rotation.

2. Classification by Load-Bearing Capacity
They are divided into multiple levels, with load-bearing capacities ranging from 1500 kN to 50000 kN .

3. Classification by Model
Common models include SGH-M, SGV-L, SGF-20020025, etc. .
- SGH-M: Represents a pot rubber bearing with high transverse stiffness and large axial load-bearing capacity.
- SGV-L: Represents a pot rubber bearing with high vertical stiffness and small axial load-bearing capacity.
- SGF-20020025: Represents a pot rubber bearing with rigid elements, where the width and length are 200 mm respectively, and the height is 25 mm.

4. Classification by Application Scope
They include pot rubber bearings for highway bridges, pot rubber bearings for railway bridges, and derivatives of pot rubber bearings.
- Pot rubber bearings for highway bridges: Common models include several series such as GPZ pot rubber bearings, GPZ (Ⅱ) pot rubber bearings (in accordance with GT391-19), and GPZ (KZ) pot rubber bearings.
- Pot rubber bearings for railway bridges: Common models include TPZ-I railway pot rubber bearings, TPZ standard railway pot rubber bearings, and Zhuanqiao 8156 railway bridge bearings.
- Derivatives of pot rubber bearings: Such as QPZ pot rubber bearings, KPZ series pot rubber bearings, elastic shock-absorbing spherical steel bearings, self-height-adjusting pot rubber bearings, etc.

◆◆ Main Characteristics of Pot Rubber Bearings

The main characteristics of pot rubber bearings include:

1. High Load-Bearing Capacity: Pot rubber bearings can withstand large vertical loads, making them suitable for the construction of large-scale bridges. This is because the rubber blocks inside the pot rubber bearings exhibit fluid-like properties under triaxial stress, enabling them to provide sufficient reaction force.

2. Large Horizontal Displacement Capacity: Pot rubber bearings achieve horizontal displacement of the superstructure through the low friction coefficient between the polytetrafluoroethylene (PTFE) plate on the middle steel plate and the stainless steel plate on the upper seat plate. This design grants them a large horizontal movement capability.

3. Flexible Rotation: The rubber blocks of pot rubber bearings can realize the rotation of the superstructure under triaxial stress. Meanwhile, the low friction coefficient between the PTFE plate and the stainless steel plate facilitates horizontal displacement, making the bearing more flexible during rotation.

4. Simple Structure: Pot rubber bearings have a relatively simple structure, consisting of an upper seat plate, a sealing ring, a rubber plate, a bottom pot, anchor bolts, a dust cover, and other components. This simplicity makes them more convenient for installation and maintenance.

5. Low Construction Height: The design of pot rubber bearings results in a low construction height, which is highly beneficial for bridge design as it can reduce the overall height of the bridge.

6. Easy Processing and Manufacturing: The structural characteristics of pot rubber bearings make their processing and manufacturing more convenient. Additionally, they can save steel materials and reduce construction costs.

7. Good Cushioning Performance: The rubber blocks of pot rubber bearings can provide excellent cushioning performance, which is highly advantageous for absorbing external impact forces such as those from earthquakes.

In summary, pot rubber bearings possess characteristics such as high load-bearing capacity, large horizontal displacement capacity, flexible rotation, simple structure, low construction height, easy processing and manufacturing, and good cushioning performance. They are therefore an ideal type of bearing suitable for the construction of large-scale bridges.

◆◆ Pot-Type Rubber Bearings

Pot-type rubber bearings are a new type of bridge bearing composed of steel components and rubber. They boast advantages such as high load-bearing capacity, large horizontal displacement range, and flexible rotation, and have an extremely wide range of application fields, mainly including the following aspects:

1. Bridge Engineering

1.1 Highway Bridges

They are suitable for newly built and maintained bridges, such as those on expressways, urban roads, and national/provincial trunk highways. For simply supported beam bridges and continuous beam bridges with a span of more than 30 meters, pot-type rubber bearings can withstand vertical loads of thousands of tons while adapting to the horizontal displacement of the beam body caused by temperature changes.

1.2 Railway Bridges

Railway bridges have high requirements for the load-bearing capacity and stability of bearings, and pot-type rubber bearings can meet these requirements, thus being often used in the construction of railway bridges. Common types of railway pot-type rubber bearings include TPZ-I Railway Pot-Type Rubber Bearings and Zhuanqiao 8156 Railway Bridge Bearings.

1.3 Curved Bridges and Ramp Bridges

Curved bridges generate lateral forces under the action of vehicle centrifugal force, while ramp bridges have longitudinal component forces. By optimizing the design of sliding plates and the hardness of rubber, pot-type rubber bearings can bear both vertical loads and horizontal forces, ensuring stable deformation of the beam body under complex stress conditions.

1.4 Bridges in Seismic-Prone Areas

In bridges located in areas with a seismic intensity of 7 degrees or above, seismic-resistant pot-type rubber bearings can absorb seismic energy through the elastic deformation of rubber. At the same time, they limit the maximum displacement of the beam body to prevent the beam from falling, significantly enhancing the seismic safety of the structure.

2. Construction Engineering

2.1 High-Rise Buildings

Pot-type rubber bearings can be used for the structural support of high-rise buildings. They can bear the huge weight of the building and, when natural disasters such as earthquakes occur, play a shock-absorbing role through their own deformation, improving the seismic performance of the building.

2.2 Large-Span Spatial Structures

For large-span spatial structures like large stadiums and exhibition halls, pot-type rubber bearings can support the weight of the upper structure and adapt to the displacement and rotation of the structure caused by factors such as loads and temperature changes, ensuring the stability and safety of the structure.

3. Other Engineering Fields

3.1 Municipal and Water Conservancy Engineering

Pot-type rubber bearings are also used in bridge structures of some municipal bridges and water conservancy facilities, such as urban overpasses, pedestrian overpasses, and water-passing bridges in water conservancy projects, to meet the load-bearing and deformation needs in different engineering scenarios.

3.2 Special Structures in Industrial and Civil Buildings

They can also exert their advantages of high load-bearing capacity and flexible rotation in special structures, such as the foundation bearings of some heavy industrial buildings and special civil building structures with high requirements for vibration and displacement control.

◆◆ Installation of Pot-Type Rubber Bearings

1.Install the anchor bolts at the four corners of the bearing base plate.

2.Pour concrete for the bearing pier, and leave a section of height at the top—this reserved height should be larger than the length of the bearing's anchor bolts.

3.Hoist the bearing to the position above the bearing pad stone, and correct its horizontal position and height.

4.Pour concrete for the bearing pad stone.

5.Install the 4 anchor bolts on the upper part of the bearing.

6.Install the formwork for the cast-in-place beam, and bind the steel bars of the cast-in-place beam.

7.Pour concrete for the beam body.

8.Remove the temporary connections on both sides of the bearing.

1. What are your main products?

Our main products include:  Anti-Seismic Flexible Pipelines ；Bridge Bearings ；Bridge Expansion Joints ；Sealants ； Waterstops

2. Can you provide customized products?

Absolutely! We offer tailored solutions based on your project’s specific requirements, covering everything from material selection (such as NBR, EPDM, and more) to structural design. All custom orders come with detailed technical drawings and professional installation guides to ensure seamless implementation.

3. What certifications does your company possess?

We hold ISO certifications for quality, environmental, and occupational health management systems, ensuring strict compliance with GB/T 17955-2019 and other national standards.

4. Do you offer installation support?

Yes, we provide after-sales support, including remote video guidance for installation.