News for hackers. Stuff that matters.

A comment on What If Every City Had a London Overground?. Parent comment

Re:What If Every City Had a London Overground? by mshockwave on Sunday August 24, 2025 @12:45PM (#45005686)
The scenario suitable for TBM is surprisingly limited so even nowadays many tunnels are still dig using the good’o way, mostly with explosives
[ Parent | on HN ]
Re:What If Every City Had a London Overground? by GeoAtreides on Sunday August 24, 2025 @02:20PM (#45006416)
??? explosives? in mud? (well, clay)?!

tunnels are bored depending on the soil, length, diameter. Most projects I have seen use TBMs and the New Austrian Tunneling Method. Explosives are quite the minority (not many tunnels are in solid rock), even the Gotthard tunnels were dug with TBMs

[ Parent | on HN ]