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Monitoring during demolition works at Tottenham Court Road
Crossrail is a major new railway, 73 miles in length, that will link Berkshire and Buckinghamshire, via Greater London, to Essex and Kent. Ten-car trains will run at frequencies of up to 24 trains per hour in each direction through the central tunnel section. The central section of the Crossrail route will run via Paddington, Tottenham Court Road, Farringdon, Liverpool Street and Whitechapel stations.
The Crossrail C208 project formed a critical enabling package within the wider Crossrail programme, focused on early demolition and site preparation works around Tottenham Court Road in central London.
Delivered ahead of the main station construction, C208 involved the controlled demolition of buildings between Dean Street and Great Chapel Street to clear the footprint for the new Western Ticket Hall, which now provides access to both the Elizabeth line platforms and the existing Central line.
The works were carried out in an exceptionally constrained urban environment, surrounded by residential properties and listed heritage buildings, requiring careful sequencing, noise and vibration control, and close coordination with adjacent stakeholders to minimise disruption.
Demolition Monitoring
Sixense were appointed to carry out structural monitoring of the ground and buildings directly adjacent to the demolition site and provide baseline monitoring in advance of the main contract works.
In order to minimise the risk of damage and assess impacts on buildings, streets, pathways and utilities during the demolition and construction works, a comprehensive instrumentation and monitoring programme was required by the contractor delivering Crossrail C208.
Sixense installed and managed a range of equipment and set up a comprehensive monitoring regime. The contract required strict control, working in residential areas of London surrounded by heritage structures with listed building status. At the request of Crossrail, structural and environmental monitoring was installed that would enable the successful completion of the demolition works without undue disruption to surrounding structures and neighbours.
On completion of the demolition and baseline monitoring, the monitoring system was handed over in its entirety to the Main Contractor for the Western Ticket Hall works.
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