Kangaroo Point Green Bridge (KPGB)

Description

The project includes the design and construct of a 460m long pedestrian-cyclist bridge connecting Brisbane CBD to the Kangaroo Point, crossing over the Brisbane River. The main structure is a single 90m tall mast cable-stayed bridge, whose deck is composed of structural steel and composite concrete slab. The project was awarded in July 2021 and is expected to be open to the public in late 2024.

Rizzani de Eccher Australia, as an integrated specialist within BESIX Watpac organization, was involved from the initial preliminary stages of the Expression of Interest (EOI), through to shortlisting and tender via Early Contractor Involvement (ECI), to conduct all the required construction engineering studies, methodologies and temporary works required to construct and install the bridge within the constrained and limited site area. The preferred method to erect the steel deck superstructure in segmental modules supported on temporary portals was deemed feasible and ultimately implemented, with specific sizes and splice locations determined very early to maximize crane capacity and minimize site transportations. A similar approach was implemented for the pylon modules that were delivered by barge and installed by the world’s biggest tower crane by MARR, with integrated access system to facilitate installation and welding operations at heights.

Tensa also participated to the project, and supplied and supervised the installation and commissioning of the cable-stay system, which were installed by using a unique custom-made Building Maintenance Unit (BMU) equipment supplied by Alimak/Manntech, and the Tuned Mass Damper in the deck, which was required to manage the dynamic behavior of the structure.

The distinctive architectural features of the unique mast and the cable-stay bridge will progressively set the KPGB as one of Brisbane’s landmarks, and is expected to attract worldwide attention during Brisbane 2032 Olympic & Paralympic Games, ultimately boosting tourism and economic growth, and leaving a lasting legacy for generations to come.