By the end of 2014, London will have added 42 km of new underground rail tunnels as part of the Crossrail project. Here’s how the eight tunnel boring machines work.
These machines, manned by a 20-person crew, are working 24 hours a day under London’s streets.
Top Image: Crossrail tunnel-boring machine Victoria lowered into the shaft next to TBM Elizabeth at the Limmo site in London’s Royal Docks area. Courtesy Crossrail.
Text and Image via SINCANADA