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T H A M E S T I D E W AY T U N N E L

Thames Tideway Tunnel - Our Plan

and Grands Projects Bachy Soletanche, has the east contract. The engineering marvel that is the TTT is 25 kilometres long, descends 30 metres at its western end and 66 metres at its eastern and is over seven metres in diameter. The TTT will be the biggest infrastructure project ever undertaken by the UK water industry. It will follow the route of the River Thames connecting to the combined sewer overflows located along the riverbanks. En route, it will travel underneath all other London

infrastructure and through a variety of different ground environments. It will be dug out by German-made, underground-conditioned, tunnel boring machines (TBMs). These extrude the excavated material, which is removed with a conveyor belt or, in wetter places, a slurry pipeline. As excavation advances, the tunnel is encased in a concrete shell using precast segments. The TBMs are introduced through a vertical shaft. Later, the existing overflow shafts will be connected to the great tunnel, 11

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Without a doubt, one of the biggest issues monopolizing headlines in 2014 was the energy “crisis:” who was to blame; who had the (right) sol...