Brisbane’s skyline is set to be transformed with the addition of the Kangaroo Point Green Bridge (KPGB), a project that showcases not only cutting-edge engineering but also highlights the critical role of temporary works in large-scale infrastructure development.
The KPGB project, led by the Connect Brisbane consortium with BESIX Watpac at the helm, recently achieved a significant milestone with the installation of a 25-metre mast.
This 180-tonne masthead, equivalent in weight to three double-decker CityCat ferries, was carefully maneuvered into place during low tide, demonstrating the precision required in such complex operations.
Jonathan Davies, Managing Director of CaSE Civil & Structural Engineering, emphasised the importance of temporary works in the project: “The KPGB project not only stands as a testament to the critical role of temporary works in contemporary construction but also highlights how innovative planning in these works is essential for managing intricate designs and operational challenges in construction.”
CaSE & Pike Design, a key subcontractor for the design of temporary works, played a crucial role in the project.
Their involvement included designing jacks and sledges for fine-tuning and aligning bridge segments during welding, ensuring both accuracy and safety in the construction process.
The project employed innovative solutions for various challenges, including:
- Girder support during storage at the Port of Brisbane
- Interface planning for Self-Propelled Modular Transporters (SPMTs)
- Extensive crane lift studies for safe loading and unloading of modules
- Custom tie-down and support designs for barge transportation
- Specialised lifting lugs, rigging, and lift planning for each module
- Design of stressing and welding platforms for cable stays and steel bridge segments
Russel Odendaal, Principal Engineer for CaSE & Pike Design, highlighted the unique aspects of the project: “The KPGB was constructed in segments of varying lengths, supported by temporary portals.
“This segmental approach, quite unusual for a cable-stayed bridge, reflects the innovative solutions temporary works can provide.”
The project also benefited from international collaboration, with teams spread across Spain, Brazil, and Australia.
This global approach enabled 24/7 work progress and brought diverse expertise to the table.
Upon completion in 2024, the KPGB is expected to serve over 6,100 pedestrians and cyclists daily, potentially reducing annual vehicular traffic on the Story Bridge by 84,000.
This project not only enhances Brisbane’s urban mobility but also contributes to environmental sustainability.
As Brisbane evolves into a ‘bridge city’, the KPGB stands as a testament to the power of innovative engineering and the often overlooked importance of temporary works in bringing ambitious infrastructure projects to life.