To remotely monitor arches and foundations subject to deterioration due to ground condition and timber pile failure.
Arch 34 at Whalley Viaduct was due for remediation and required investigation to ensure the suitability of temporary works.
A system of arch and foundation monitoring need to be efficiently designed, installed and operated.
This system was live before, during and after the underpinning and structural repair works.
A fully remote controlled system was installed from access gantries to monitor the propagation of arch deformation and pier settlement.
Datum’s extensometers were then installed to 12m depths to monitor the effect of piling and underpinning works on the existing failed foundations.
Rotation sensors were installed to monitor pier rotation, and automated track monitoring was used to detect even the smallest change to track geometry.
Real-time remote supervision was provided by Datum’s control centre.
Engineers were provided with evidence that repairs had halted deterioration and that new foundations worked to prevent further settlement.
The continuous real-time response from Datum provided further reassurance that trains were safe to run and that the structure was remediated.