Queensland Curtis LNG (QCLNG) Mainland Facility

Bonacci Infrastructure delivered the detailed design for the Queensland Curtis LNG (QCLNG) Mainland Facility in Gladstone, Queensland, Australia. The project involved the construction of a roll-on roll-off (RO-RO) floating dock, berthing dolphins, a floating passenger ferry terminal, and associated linkspan bridge and gangway structures.

The RO-RO floating dock was constructed from an existing 76.2 x 24.4 x 3.66 metre dumb barge which was modified to include appropriate fendering, concrete ramps for vehicle access, restraining dolphins and a linkspan bridge connections. A similar, albeit smaller, dumb barge was used to construct the passenger ferry terminal. Bonacci Infrastructure also completed slope stability assessments and the design of the reinforced earth abutment for the linkspan bridge.

Temporary works completed as part of the project included a “toblerone” piling frame for the construction of the Material Offloading Facility (MOF) walls, a barge mounted “A” frame piling gate, and various drill rig and personnel access platforms.

The “toblerone” piling frame was mounted off a travelling crane platform and made use of two existing “toblerone” trusses as the main supporting arms for the cantilevered piling gate.

The platform bogies incorporated sets of 100 tonne capacity skates which allowed the combined piling gate and 240 tonne crawler crane assembly to be moved laterally using winches. The system was very successful and allowed completion of the piling works well ahead of schedule.