Bonacci Infrastructure delivered the temporary works design for the replacement of the existing bridge over Burrill Lake. The new bridge comprised sixteen 18 metre long spans, each with a width of 17 metres, and formed part of broader upgrades to the Princes Highway.
Key temporary works design features included:
- A 200 metre long x 30 metre wide temporary rock causeway to provide access for piling rigs and cranes with a capacity of up to 350 tonnes. The sub-base consisted of submerged sand up to 1 metre below water at high tide. The rock platform was constructed in three layers, each up to 1.35 metres thick. Extensive plate load testing was carried out to confirm geotechnical capacities.
- Suspended formwork, column formwork, utilities supports, cofferdams and precast girder restraints.
- Structural checks on precast concrete girder stresses and assisting the Contractor with girder non-compliances.
- Demolition of the existing bridge.
Photo credit: Gama Video Productions
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