Parallel Wire Stay Cable System

Features of Wire Cable System

  • Being prefabricated on production line in factory
  • Being packed in reel to transport
  • Integral tension; tensile tonnage accurate; cable force uniform; cable adjustment convenience and accurately tested by sensor.
  • Extension products are complete with external damper and load cell can be applied to the system for special requirements.  

 

Stay Cable Structure

 

 

  • PE Sheath

 

The stay cable system usually  adopts two types of double-layer PE structures.

 

                                                                                   Double-layer  PE    

                                                                                   PE and Double helix

 

 

 

 

  • Steel Wire

 

Galvanized Steel Wire 

Galvanized steel wires are made parallel together into a bundle by cable production equipment. Then twist concentrically 2~ 4°to the right. Wrapping up the cable by high strength polyester and then hot extruded with HDPE sheath. Finally, cut and mark the cable according to confirmed unstressed length of cable (usually under 20℃).

 

Schematic Diagram of Galvanized Wire Stay Cable

 

  •  Epoxy steel wire

 

Epoxy coated steel wire adopts electrostatic spraying technology; spraying special epoxy powder on the surface of the wire to create a protective coating with good anti-corrosion property.

 

Schematic Diagram of Epoxy Coated Wire Cable

 

Anchorage Structure of Arch Bridge Hangers

 

Suggestions for designing the hanger

  • Hanger safety factor: n=2.5~3.
  • The shortest free length of hanger should be not less than 2 meters.
  • The lower embedded pipe must be stretched out of the deck structure to 100mm to 150mm length to ensure water-proof performance at bottom.

 

Anchorage Structure of Hanger 

The following 3 types of anchorage can be selected according to the requirements of arch bridge design.

 

 

Type Ⅰ Anchorage with Nut ( Used for Used in Arch end & Deck end Beam end)

 

1.Stressing–end or Dead-end anchorage 

2. Bearing Plate 3. Arch Rib or Beam  4. Pre-embedded Pipe   5. Cable

 

 

Type II  Dead-end Anchorage with Fork (Used in Arch end & Beam end)

 

1. Pin  2. Fork  3. Connecting Socket  4. Sealing Sleeve  5. Cable

 

Type III Adjustable Anchorage with Fork (Mainly Used for Deck end)

 

1. Pin Roll 2. Adjusting Fork   3 Adjusting Rod  4. Connecting Sleeve  

5. Connecting Socket    6. Sealing Sleeve    7. Cable

 

Anchorage Structure of Cable-Stayed Bridge

The anchorage with nut is usually used in for both ends of the parallel wire stay cable applied to of cable-stayed bridge.

 

 

 

Structure of Chill-Casting Anchorage with Nut

 

 

 

Structure of Chill-Cast Anchorage with Fork

 

 

 

 

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