C70/80/90 Prestressed Concrete Bridge Plastic Corrugated Pipe for Precast Beams - Direct Factory Sales

I. Product Introduction

Prestressed Plastic Corrugated Pipe with Bamboo Joint Pattern is a high-performance corrugated pipe used for post-tensioned prestressed concrete structures, typically made from high-density polyethylene (HDPE) or polypropylene (PP), featuring a bamboo joint-like raised surface structure. Its core characteristics are as follows:

1. Product Features

• Strong Corrosion Resistance: Plastic material resists acids, alkalis, and rust, C70/80/90 Prestressed Concrete Bridge Plastic Corrugated Pipe for Precast Beams - Direct Factory Sales suitable for humid or corrosive environments.
• Low Friction Coefficient: Smooth inner wall reduces friction loss during prestressed tendon tensioning.
• Good Flexibility: Can be bent into various curves to adapt to complex structural construction.
• High Compressive Strength: Bamboo joint design enhances ring stiffness, resisting impact during concrete pouring.
• Excellent Sealing: Prevents cement grout infiltration, C70/80/90 Prestressed Concrete Bridge Plastic Corrugated Pipe for Precast Beams - Direct Factory Sales ensuring dense grouting in ducts.

2. Application Scenarios

• Bridge engineering (box girders, T-beams, etc.)
• Building structures (long-span floors, stadiums, etc.)
• Municipal engineering (underg utility tunnels, viaducts, etc.)

3. Common Specifications

• Diameter: Φ40mm, Φ50mm, Φ60mm, Φ80mm, etc. C70/80/90 Prestressed Concrete Bridge Plastic Corrugated Pipe for Precast Beams - Direct Factory Sales (selected based on prestressed tendon specifications).
• Length: Typically 6m per piece, customizable.
• Color: Black, blue, etc. (some manufacturers provide color codes to distinguish models).

II. Construction Process

1. Pre-Construction Preparation

• Material Inspection: Ensure pipes are free from damage, deformation, and have intact bamboo joint structures.
• Layout and Marking: Mark the prestressed tendon alignment according to design drawings, fixing support bar spacing (recommended ≤1m).

2. Installation Key Points

• Fixing Methods:
  • Use binding wires or specialized clips to secure the bamboo joint pipe to support bars, ensuring smoothness and no local bending.
  • Use specialized sleeves or heat fusion for connections, and seal with tape to prevent grout leakage.
• Precautions:
  • Avoid direct welding to prevent high-temperature damage to the pipe.
  • Bending radius must comply with standards (generally ≥3m) to prevent sharp angles.

3. Concrete Pouring

• Avoid vibrating near the corrugated pipe to prevent displacement or damage.
• Check duct暢通 after pouring (can be tested with a duct detector).

4. Prestressing Tensioning and Grouting

• Before Tensioning: Clear debris from the duct, insert steel strands or bars.
• Grouting Requirements:
  • Use specialized grouting material with water-cement ratio ≤0.4.
  • Inject from the low end, vent from the high end, ensuring full grouting.