Mammoet has supported the joint venture of Brady Marine & Civil and Georgiou Group (GBJV) with the construction of the Breakfast Creek Bridge, commissioned by Brisbane City Council in Australia.
Central to the construction was the installation of a 300-tonne, 80 m-long assembly, built offsite at the port of Brisbane. The structure needed to be lifted, transported along the Brisbane River and then installed onto its foundation over Breakfast Creek. The main concerns were maintaining the stability of the structure during transportation and installation, while ensuring minimal disruption to marine traffic, adhering to tight schedules, and upholding stringent safety and environmental standards.
Mammoet’s engineers conducted extensive feasibility studies to determine the best approach for the bridge installation and tailored a solution precisely to the project’s unique requirements, taking into account the weight, dimensions and configuration of the bridge to ensure the right equipment was selected.
At the port of Brisbane, the structure was raised to a suitable transport height using a series of climbing jacks, ranging from 100-tonne to 150-tonne capacity, and placed onto a SPMT configuration.
With the structure secured on 32 axle lines of SPMTs, it was transferred onto a barge via a ro-ro operation, ready for marine transport from the port of Brisbane upriver to Breakfast Creek. Upon arrival and positioning of the barge, timed to coincide with the beginning of the outgoing tide, the load was carefully lowered onto pre-set temporary supports, allowing the barge to be released. 150-tonne climbing jacks then lowered the bridge onto a tailor-made alignment frame, ensuring precise positioning of the structure onto its bearings.
Once the surveyor gave the sign-off, the 250-tonne low-profile jacks lowered the bridge onto its foundation.
