Dunrobin Bridge Strengethening
We strengthened the bridge substructure using a series of bonded steel plates.
We also replaced the bridge deck with a new, composite precast concrete deck system. Added was an extra challenge, with the availability of the bridge on weekends only.
Technical Details
- Installation of stainless steel plates to increase shear capacity of the hammer head piers. Plates bonded using Carbon Fibre techniques
- Replacement of 74m of cast insitu non-composite concrete deck with full depth precast concrete panels in 3.2m lengths. The panels were connected to the girders with shear studs in grouted pockets.
- The precast solution was an alternative to the designed precast/insitu concrete deck system. The alternative permitted the replacement within the allocated weekend shut down periods. The alternative was detailed by BridgePro in conjunction with the original design engineers.
- Early in the bridge deck replacement, it was discovered that the bridge carried a significant fibre optic cable. This hiccup was managed smoothly and the cable subsequently relocated, supported and protected before returning to the completed structure.
Relevance to B3, R2 Prequalification Categories
- Non-complex to moderately complex traffic management
- Moderate to complex community / stakeholder management
- Consultant team coordination
- Steel girder bridges
- Complex composite decks
- Structures carrying significant public utilities
