HMAS Stirling is the Royal Australian Navy’s primary base on the west coast and is located on Garden Island, 5km off the WA coast.
The 305m low-level bridge is located at the mainland end of the causeway which links the island to Point Peron.
The bridge comprises a reinforced concrete deck supported by a steel structure on steel piles, providing a two-lane roadway. The abutments are reinforced concrete and steel sheet piling. There have been various repair works conducted since its commission in 1972, including most recently in 2007/2008.
Duratec was engaged to perform repairs due to the accelerated deterioration of the structural steel under the bridge deck.
The scope of works included repairs to:
- Structural steel supporting the deck (beams and piles).
- Steel sheet piling.
- Reinforced concrete abutments including cathodic protection.
- Reinforced concrete deck soffits.
- Reinforced concrete deck edges.
- Expansion joints at abutments and bents.
- Duratec developed an adjustable access system to allow for changes in the water level caused by tidal and climatic fluctuations.
- The works were carried out in part of the Cockburn Sound Marine Park. Duratec’s strong environmental management systems and controls ensured minimum impact on the environment.
- Concrete Repair
- High Performance Coatings
- Bridge Maintenance