GBZY250×52(CR) Circular Plate Bearing Consult Me for Ordering

Circular Plate Rubber Bearing Product Introduction

Product Overview

Circular plate rubber bearings (GYZ/GYZF4 series) are circular bridge bearings made by alternately laminating multiple layers of rubber and thin steel plates through vulcanization bonding, featuring the following characteristics:

• Uniform and reasonable force distribution
• Easy installation
• Economical and durable
• Strong adaptability

Main Technical Parameters

Product Classification

1. Standard Type (GYZ): Fixed bearings, suitable for bridge structures without displacement requirements
2. PTFE Slide Plate Type (GYZF4): Sliding bearings, GBZY250×52(CR) Circular Plate Bearing Consult Me for Ordering surface coated with polytetrafluoroethylene (PTFE) plate, suitable for bridges requiring displacement compensation

Product Advantages

• Circular structure provides more uniform force distribution
• Excellent seismic and vibration damping performance
• Strong weather resistance and long service life
• Low maintenance cost

Circular Plate Rubber Bearing Construction Guide

Construction Preparation Stage

1. Bearing Inspection:

   • Check factory certificate and test reports
   • Visual inspection: No cracks, debonding, exposed steel plates, or other defects
   • Dimension verification: Diameter and thickness tolerance ≤ ±2mm

2. Supporting Pad Stone Treatment:

   • Strength ≥ C40
   • Surface flatness ≤ 1mm/m
   • Elevation deviation ≤ ±2mm
   • Clean surface, free from oil and dust

Standard Construction Process

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1. Measurement and Positioning → 2. Pad Stone Treatment → 3. Epoxy Mortar Leveling → 4. Bearing Placement

→ 5. Elevation Adjustment → 6. Beam Installation → 7. Inspection and Acceptance GBZY250×52(CR) Circular Plate Bearing Consult Me for Ordering

Key Construction Technical Points

1. Positioning Control:

   • Use total station for precise layout
   • Center position deviation ≤ 3mm
   • Adjacent bearing surface height difference ≤ 1mm

2. Installation Process:

   • Standard bearings directly installed on leveling layer
   • PTFE slide type should first install stainless steel plate on lower pad stone
   • Apply 5201 silicone grease lubricant evenly on PTFE surface (thickness 2-3mm)

3. Level Control:

   • Use precision level for measurement
   • Level deviation ≤ 0.5‰
   • When using wedge-shaped steel plates for adjustment, maximum 3 layers allowed

Special Condition Handling

1. Steep Slope Bridges:

   • Install wedge-shaped leveling steel plates
   • Use epoxy resin bonding between steel plate and bearing

2. Curved Bridges:

   • Pay attention to preset eccentricity
   • Adjust bearing position according to design documents

3. Low Temperature Construction:

   • Take insulation measures when ambient temperature is below 5℃
   • Prohibit installation during rain or snow

Quality Acceptance Standards

• Bearing center deviation: ≤ 3mm
• Bearing elevation deviation: ≤ ±1mm
• PTFE plate and stainless steel plate gap: ≤ 0.3mm
• Bearing and beam bottom contact: Check with 0.1mm feeler gauge, insertion depth ≤ 1/3 side length

Maintenance Requirements

1. Regular inspection (at least once a year):

   • Check for aging and cracking of bearings
   • Verify smooth sliding of PTFE plates
   • Check normal displacement of bearings

2. Routine maintenance:

   • Remove accumulated dust and debris
   • Maintain smooth drainage
   • Timely replace failed silicone grease