Duratec was engaged by Leighton Boral Amey JV to undertake stage 2 rehabilitation works.
Cooks River Bridge, also known as Tempe Bridge, is located on the Princess Highway at Tempe and spans across the Cooks River. The bridge was built in 1961 and consists of 2 bridge piers each composed of a pile cap supported on a single row of 28 precast octagonal driven piles. Underwater inspections revealed the driven piles were heavily deteriorated and following this inspection, stage 1 rehabilitation work was carried out.
Stage 2 consists of construction of new pier structure by encasing the pile caps.
The scope of works included:
- Design, fabrication and installation of access and temporary support system for new pier structure construction.
- Removal of precast concrete skirting panels utilising commercial divers.
- Installation of dowel bars, reinforcing steel and formwork.
- Installation of impressed current cathodic prevention system to new structure.
- Concrete to new structure with a special design mix (self- compacting).
- Installation of post tensioning bars.
- Installation of impressed current cathodic protection to pier walls.
- Removal of access and support system.
- Design of access and temporary support system, utilising existing support beams installed during stage 1.
- Fully enclosed work area with watertight platforms, withstanding tide levels of 1.9m.
- Access and support system installed utilising commercial divers.
- Strict environmental controls.
- Concrete Repair
- Cathodic Protection Design
- Bridge Maintenance