3 ms·
That definitely looks expensive to me. All those underground tunnels need huge amount of money and effort.
by harigov 11y ago
That definitely looks expensive to me. All those underground tunnels need huge amount of money and effort.
- brbsix 11y agoMaybe not, if they're able to borrow RAND's NTBM (nuclear tunnel boring machine) from Area 51.
- IshKebab 11y agoWhy would a TBM need to be nuclear? That makes zero sense.
- Twirrim 11y agoeasy power, low pollution?
- brbsix 11y agoAt least from all the preliminary studies I've seen, electric power is not really practical for all but the smallest diameters. FYI I'm referring to the use of a rock-melting penetrator rather than a traditional cutting head. This is maybe just science fiction at this point, but it came to mind as the sort of technology that would make these sorts of projects economically feasible. http://www.osti.gov/scitech/servlets/purl/4687637 http://www.osti.gov/scitech/servlets/purl/4687637 http://www.osti.gov/scitech/servlets/purl/4444905 http://www.osti.gov/scitech/servlets/purl/4444905
- adrianN 11y agoHere in Berlin they have been working to build 2.2 new kilometers of subway since 2010. They expect to finish around 2020, having spent 500 million Euros. Building tunnels is really expensive. Barring radical longevity improvements, I don't think I'll live to see an underground transportation network.