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It would be fun to see an "agile" tunnel project. "This rock is too solid to drill through with our machines!" – "Ok, for now let's just drill around it and ma
by elcapitan 10y ago
It would be fun to see an "agile" tunnel project.
"This rock is too solid to drill through with our machines!" – "Ok, for now let's just drill around it and make it an underground rollercoaster instead of a railway, we can get back to the original design later!"
- tonyedgecombe 10y agoThat's not agile, that's a pivot :)
- Annatar 10y agoNot in this case, as the train is specified to go at 250 km/h, which means that the tunnel had to be pretty straight, or else the train might derail at that speed.
- ucaetano 10y agoWhich would make it an even more fun roller coaster!
- crzwdjk 10y agoThis actually happened in St. Petersburg, when they ran into difficulties tunneling under the river on Line 2. They ended up going under the difficult section, and now there's a 6% downgrade on that section of the line, which is pretty much a rollercoaster by subway train standards.