CROSSRAIL'S DRILLING RIG

摘要

WHEN CROSSRAIL COMPLETED ITS epic tunnel boring efforts in June 2015 it took the project from one major stage of construction to another. With the two 21km, twin tube, 6.2m diameter tunnels in place the Alstom, TSO and Costain (ATC) joint venture could push ahead with its challenging GBP 300M (USD 376M) fit out contract. But in order to fit the services including overhead power lines, the cable management system, emergency walkways, firefighting system and electrical cables, ATC needed to drill a lot of holes - more than 250,000 to be precise. And in typical Crossrail style the contractor looked for new, more efficient technologies to accelerate the process, resulting in the creation of a bespoke automated tunnel drilling machine.