FORCE Technology presented their unique concrete corrosion monitoring system in connection with the construction of China’s first subsea tunnel.
As part of the development of China’s infrastructure, a new tunnel, the Xiang An tunnel, is under construction - connecting the mainland with the island Xiamen.
The tunnel, 7 kilometres long and double tubed, is the first Chinese subsea tunnel. In order to optimise the maintenance strategy and ensure a long service life, the construction owner had decided that a corrosion monitoring system should be installed in the tunnel.
Corrosion monitoring systems unknown in China
In China, corrosion monitoring systems have generally not been considered or used in concrete structures. Therefore, experience with the different techniques and systems has not yet been obtained.
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Montering af FORCE Technologys betonovervågningssensor i Xiang An tunnellen. |
To select the most optimal corrosion monitoring system, Xiamen University was engaged as expert advisors. They ordered the newly developed fully automated corrosion monitoring system from FORCE Technology and a number of sensors to be embedded in the concrete. The sensors are used for testing and evaluating the system both in the laboratory and on-site in the tunnel.
Demonstration of embeddable corrosion sensors
With the role as expert advisor Xiamen University also arranged and hosted the workshop “Corrosion of oceanic structures”. Here, FORCE Technology gave a presentation of their data logger system. During the workshop, a visit was made to the Xiang An tunnel where the different types of embeddable corrosion sensors from FORCE Technology were demonstrated and installed in the tunnel wall with great success.
