What Lies Beneath: Excavating Crossrail's tunnels | In-depth | The Engineer
Description
This is fascinating reading. Example facts from this piece: tunnel boring machines go at about 100m per week, and have a turning radius of 250m. Inpressive enough, but in places the tunnels these things are cutting are passing with 1m of existing tunnels, which, obviously, it would be very bad if they were to hit. "Lads, we've got to start turning now, so that we're in the right place in 2 weeks time. If we're out by over a foot, were going to cause major damage to something expensive. No do-overs. Everyone ready?"
User
Pinboard ID
71940ac524754aa02a1fbc427bbb4b47
Created
April 02, 2012 12:13 PM
Updated
March 11, 2026 03:23 PM
Link Status
Dead (HTTP 301)
Last Checked
March 11, 2026 03:23 PM