Prestressed FRP laminate system for strengthening the bridge

During the regular inspection of Fenghu River Bridge in Fenghuang Expressway, cracks were found in many structures. Therefore, under the actual operation load, the flexural capacity of box girder was insufficient, then reinforced with HM prestressed carbon fiber reinforced polymer(CFRP)laminate​ system to improve the original structure , repair the cracks, improve the bearing capacity and durability of the bridge

prestressed carbon fiber reinforced polymer(CFRP)laminate


Project Overview

During the regular inspection of Fenghu River Bridge in Fenghuang Expressway, cracks were found in many structures. Therefore, under the actual operation load, the flexural capacity of box girder was insufficient, then reinforced with HM prestressed carbon fiber reinforced polymer(CFRP)laminate system to improve the original structure ,  repair the cracks, improve the bearing capacity and durability of the bridge.


Reinforcement time

2015 year


prestressed carbon fiber reinforced polymer(CFRP)laminate


Reinforcement method

HM prestressed carbon fiber reinforced polymer(CFRP)laminate system


Material selection

HM prestressed carbon fiber reinforced polymer(CFRP)laminate 


Construction technology

  1. location and paying off

  2. polish

  3. drilling hole

  4. grooving

  5. repairing and leveling

  6. planting anchor

  7. installing bounding box

  8. installing anchor block

  9. fixing carbon fiber laminate

  10. fixing jack and high strength anchor bolt

  11. prestretching

  12. applying epoxy resin 

  13. prestretching

  14. removing the thread rod

  15. tablet fixing 

  16. finished product protection


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