DUNBOGAN BRIDGE REHABILITATION
Dunbogan Bridge over Camden Haven Inlet on Reid St at Dunbogan was constructed in 1967.
It is 198m long and comprised 10 spans of 19.8m. The bridge superstructure consists of a reinforced concrete deck, supported by 1.3m deep pre-stressed concrete I-girders. The bridge substructure comprises 9 piers with a total of 36 piles.
In 2016, Dunbogan Bridge was identified as the highest ranked bridge in terms of risk due to significant chloride induced reinforcement corrosion in the piles with section loss. PMHC subsequently engaged MLEI to complete the investigations, determine the bridges structural capacity, and provide engineering advice regarding potential strengthening and rehabilitation options.
The project’s scope included a comprehensive bridge assessment featuring load and brake testing and the superstructure and substructure rating.
MLEI provided the following services:
- Strategic options assessment
- Bridge Testing
- Load testing
- Brake testing
- Rating of superstructure & substructure
- Finite element (FE) analysis
- Trigger, action and response planning (TARP)
- Bridge design
- IV of detailed design
- Flood load assessment
- Bridge rehabilitation.
The Dunbogan Bridge Rehabilitation project, led by MLEI was successfully concluded in 2020. It highlighted MLEI’s expertise in enhancing the structural integrity and safety of existing bridge infrastructure.