Outcome The effectiveness of the monitoring program at this challenging site was built on a combination of the expertise of AECOM’s structural and monitoring engineers and the ease of deployment and reliability of the Senceive technology. The use of Nano and ODS sensors on the tunnel lining allowed the anticipated movements of the lower side walls to be monitored without interfering with the works. This was a key consideration given the restricted program of works (the tunnel closure was only three days) and the nature of the construction works which restricted access and line-of-sight. An extended program of monitoring was needed to verify the behavior of the culvert due to the changes in loading following the track lowering. As a result, monitoring was installed post-works on the down line track. Over 400 sensors were installed on the trackbed by two engineers within just four hours. Once movement was shown to be stable, the sensors were removed, with the rest of the monitoring equipment removed in the following weeks.
Over 400 sensors were installed on the trackbed by two engineers within just four hours.
The sensors will likely be re-deployed on a future AECOM project.
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