The structural integrity of the eight steel bridge piers was in question as a result of exposure to salt and fresh water from the ocean and Lake Frome. Extensive repairs were required in order to prevent the bridge being closed to vehicle traffic.
SEWCDB, in conjunction with a third party, developed a work scope to encase the piers.
Work needed to be carried out strictly in line with the scope to ensure the safety of the bridge, local community and visitors.
Works comprised abrasive blasting and cleaning the piers. FRP jackets were installed, in accordance with the scope of works.
A protective coating system was applied to the areas which would not be encased in the jackets.
Before commencing any work we needed to stop water from entering the work area.
Sheet piling was installed downstream from the bridge and an embankment installed upstream across the Lake Frome outlet drain.
Water was pumped out to ensure the piers remained dry while the work was carried out.
Channels were then dug around each pier and containment was set up so blasting and cleaning would not contaminate the waterway.
Once preparation works were finalised a protective coating was applied to the top of each pier, then installation of the FRP system began.
Each pier was reinforced and wrapped with the FRP, the void was filled with a high strength cementitious underwater grout and sealed using an epoxy grout.
Our workers undertook training with the supplier to ensure the Fibre Reinforced Polymer (FRP) system was correctly installed.
As a result Swart are now certified installers of the QuakeWrap Pile Medic System in South Australia.
To learn more about this story call Mark O'Brien on 0418 814 538 or send an email to mark@swartandsons.com.au
