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.
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 the structural steel supporting the deck (beams and piles), steel sheet piling, reinforced concrete abutments and deck soffits, reinforced concrete deck edges, guardrails and expansion joints at abutments and bents.
The project required the removal of existing coatings from the underside of the bridge including the existing coal tar epoxy. The coal tar epoxy removal required a fully encapsulated work area for the safe management of a hazardous material in a full working environment, including a negative air pressure filter and HEPA filters.
The scope included:
- Water wash prior to dry grit blasting.
- Application of Denso SeaShield ST epoxy.
- 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