A long-term regular maintenance plan coordinated by Freyssinet
Freyssinet has developed a maintenance plan that stipulates which elements of the cables must be inspected during the expected 120-year lifetime of the bridge. This maintenance plan also shares the tasks between Freyssinet and Gefyra SA. Gefyra’s inspectors are in charge of the yearly visual inspection of the stay cable system and Freyssinet provides technical assistance and equipment for each specialised inspection. If during a regular inspection a major unexpected event is detected such as signs of corrosion, remedial action is taken immediately.
In addition to the field inspection, Gefyra has integrated monitoring software developed by our sister company Sixense, that carries over 80 sensors, including accelerometers on the deck, pylons and stay cables.
>> Learn more about Sixense scope of work
The good news is that 2022 inspection show that the bridge appears to be in very good condition overall. “Minor corrosion spots were noticed on a few accessories of threaded components, which are always the most difficult to coat for marine environments, but nothing unexpected considering the exposure and the fact that we are now over 17 years after the installation”. Explains Réka Szécsényi.