Bridge Pot Bearing is a heavy-duty structural bearing system designed to support large vertical loads while allowing controlled rotation and horizontal displacement in bridge structures.
The bearing consists of a steel pot, an elastomeric disc confined within the pot, and a piston that transfers vertical load. When subjected to load, the confined elastomer behaves like an incompressible fluid, enabling rotation while maintaining high load capacity.
Bridge pot bearings are widely used in long-span bridges, heavy-load highway bridges, railway bridges, and complex infrastructure projects where laminated rubber bearings cannot meet load or displacement requirements.
Product Classification
By Movement Capability
1. Bidirectional Movable Bearing (Code: SX)
Vertical load capacity
Rotation capability
Longitudinal and transverse sliding movement
2. Unidirectional Movable Bearing (Code: HX / ZX)
Vertical load capacity
Rotation capability
Sliding movement in one direction
3. Fixed Bearing (Code: GD)
Vertical load capacity
Rotation capability only
No horizontal displacement
Technical Performance
|
Item |
Specification |
|
Design Rotation (θ) |
≥ 0.02 rad |
|
Vertical Load Capacity |
400 kN – 60,000 kN (33 load grades) |
|
Friction Coefficient |
μ ≤ 0.03 (Normal type) |
|
μ ≤ 0.05 (Cold-resistant type) |
|
|
Longitudinal Displacement |
±50 / ±100 / ±150 / ±200 / ±250 mm |
|
Transverse Displacement |
±50 mm (for movable types) |
Structural Features
- High-strength steel housing
- Confined elastomeric disc
- PTFE sliding surface (for movable types)
- Stainless steel sliding plate
- Corrosion-protected components
The confined elastomer ensures rotation performance while maintaining extremely high compressive strength.
Key Advantages
- Extremely high vertical load capacity
- Suitable for long-span bridges
- Stable rotation performance
- Low friction sliding system
- Reliable performance under repeated traffic loads
- Long service life
- Designed for heavy infrastructure projects
Customization Service
We provide:
- Load grade selection (33 levels available)
- Custom displacement range
- Anti-corrosion coating options
- Cold-resistant configuration
- Manufacturing based on project drawings
Technical support and documentation are available for engineering contractors and project owners.
FAQ
Q: 1. How is a pot bearing installed on site?
A: Pot bearings are typically installed using anchor bolts and leveling mortar. Proper alignment and surface preparation are critical to ensure correct load transfer and long-term performance.
Q: 2. Is maintenance required after installation?
A: Pot bearings are designed for long-term service with minimal maintenance. However, periodic inspection is recommended to check sliding surfaces, sealing rings, and corrosion protection.
Q: 3. Can pot bearings be replaced after years of service?
A: Yes. Pot bearings can be replaced using temporary lifting systems. This is common in bridge rehabilitation and maintenance projects.
Q: 4. What anti-corrosion options are available?
A: Bearings can be supplied with protective coatings such as epoxy painting, hot-dip galvanizing (for exposed parts), or custom anti-corrosion systems based on project environment.
5. Are testing reports provided before shipment?
Yes. Factory inspection reports including dimensional check, material certification, and performance testing can be provided upon request.
Q: 6. What environments are pot bearings suitable for?
A: They are suitable for heavy traffic bridges, seismic regions, and large-span structures. Cold-resistant configurations are available for low-temperature areas.
Q: 7. What is the typical service life?
A: Under proper installation and normal operating conditions, the design service life is typically 25–30 years or longer.
Q: 8. Do you provide technical support for international projects?
A: Yes. Technical documentation, installation guidance, and drawing confirmation support are available for overseas contractors and project owners.
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