TUNNELLING HAS begun on new bores in the King's Cross area of north London to link the East Coast Main Line and Thameslink railways.
London-based firm Joseph Gallagher is using a 50m long tunnel boring machine called Gertrude, supplied by Dosco Overseas Engineering, to form the tunnels under Section 2 of the Channel Tunnel Rail Link.
Each 6m diameter tunnel will be 650m long. They will run from near York Way, under the Regents Canal and Camley Street, and connect with the Thameslink route close to St Pancras Station, the London terminus for CTRL.
About 92,000m 3of soil will be produced, and will be used as lining and capping material for landfill sites. The tunnels will be lined with precast concrete segments supplied by Charcon Tunnels.
CTRL project manager and designer Rail Link Engineering and contractor Kier Nuttall Joint Venture will complete the tunnels while the area is still a brownfield site, to help the rapid regeneration of the area.