A new terminal will be constructed to the west side of Euston Station, overlapping the existing footprint. As a result, a large area of the existing station is required to be demolished, involving the removal of platforms 17 and 18.
The original buildings were not designed to have sections later removed, so the partial demolition and excavation works could generate movement. The understanding and management of this movement is crucial to provide assurance that the effects it has on the existing parcel deck and trainshed are acceptable and, critically, will allow this busy transport hub to remain operational during the major works.
Working with Skanska, SOCOTEC Monitoring UK Ltd – formerly ITM Monitoring - is monitoring the trainshed framework joints for potential horizontal movements and separation as part of IP Central, one of Network Rail’s Infrastructure Project regional frameworks which aims to increase capacity across the railway network.
At the parcel deck roof level, the top of selected columns will be monitored for biaxial horizontal movement. The automated monitoring system will utilise displacement transducers with integrated thermistors, arrays of tilt beams and tiltmeters, with data from all sensors visualised via Calyx, SOCOTEC Monitoring UK’s online data visualisation platform. Settlement monitoring will also be carried out by Skanska’s in-house survey team, with the data being uploaded to Calyx alongside the automated monitoring data.
Installation of the monitoring system commenced early February 2019, three months prior to the start of any demolition works to provide sufficient baseline readings. Monitoring will continue for two years, concluding after the completion of the superstructure.