Lujiazui Bridge: Key Island‑Link Project in Zhejiang, China
The Lujiazui Bridge in Putuo District, Zhoushan City Zhejiang Province is a three span arch through tied -arch bridge. It has atotallength of 174o meters and a bridge length of 1.458 meters,with construction starting in 2006 To ensure the quality and safetyof the bridge’s operation, a bridge upgrading and renovation proiect was launched in July 202s. Our company is responsible for themanufacture of suspender materials for the entire bridge
| Product | Function / Role in the Bridge |
|---|---|
| Prestressed steel strand | Provides tensile strength to concrete girders, resisting bending and shear forces. |
| Anchor assembly (wedges, anchor plates) | Transfers and locks the prestressing force at tendon ends, ensuring long‑term load retention. |
| Post‑tensioning jack | Tensions strands to the required force; hydraulic cylinder pulls strand while wedges hold it. |
| Hydraulic oil pump | Supplies high‑pressure oil to the jack, enabling controlled and synchronized tensioning. |
| Corrugated metal duct | Forms the void in concrete for strand passage, allows post‑tensioning and later grouting. |
| Grouting pump & material | Injects cement grout into ducts after tensioning, bonding strand to structure and preventing corrosion. |
| Tensioning monitoring system | Measures elongation and pressure in real time, ensuring accuracy and safety of prestressing. |
