To properly determine the civil engineering scope of the renovation, it is essential to have the best possible insight into the condition and deformation behaviour of the tunnel. To develop this knowledge, it is important to start monitoring in a more structured way, so that there is more and better data with which to conduct research. To this end, the COB network develops a monitoring strategy.

Version 1 of the strategy is published in October 2022. The scope is currently limited to deformation(s) of the construction(s) and joints of immersed tunnels, considering both new construction and existing tunnels. Expansion with data processing, lessons learned and other tunnel types (such as bored tunnels and land tunnels) is planned for subsequent versions.
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