Tunnelling below the City of London

Tunnelling 10M below the City of London.

Deep below the high-rise buildings of the city of London are ancient sewers and the tube network. A tunnelling solution is required when a collapsed sewer occurs at such a depth with a very special deep shaft and tunnelling technique. M J Rooney converted half of the basement into a sewage pumping store to allow the offices to carry on as usual and dug a 10m deep steel lined shaft from within the other half of the basement. Within this shaft a tunnel was driven with steel lining and support structure to locate the collapsed section of line directly beside the underground tunnel. Drainage Repairs were completed and the Tunnel was filled with lightweight concrete to secure the structures above. Safety was paramount throughout the process with fresh air supply and tunnel safe lighting in place as well as constant air testing alarms. All of our Tunnelling Specialists have Confined Spaces Training and carry escape breathing equipment.

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