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How do they join the tunnel segments to each other? How do they properly seal it? The video glosses over that part.
by _dain_ 5y ago
How do they join the tunnel segments to each other? How do they properly seal it? The video glosses over that part.
- ggm 5y agoGrout. Inject grout between the units from a pontoon, ROV or diver to guide. When dry, inside can detach a bulkhead, remove surplus grout from new unit, and remove it's bulkhead in turn. It's shallow water so doesn't need high pressure resisting caulk seals to be mostly watertight. They say 15mm tolerance. You could butt fit rubber or polystyrene foam to keep things mostly OK and.. grout.
- Animats 5y agoThey must not be in an earthquake zone. The BART transbay tunnel has giant rubber flexible joints between segments.
- ggm 5y agoThey probably do have these too. Given time everything moves.
- SideburnsOfDoom 5y ago> They must not be in an earthquake zone It's between Denmark and Germany. You can look it up. No, it isn't in an earthquake zone.
- LargoLasskhyfv 5y agoEarthquakes are overrated. See https://en.wikipedia.org/wiki/Seikan_Tunnel#Maintenance https://en.wikipedia.org/wiki/Seikan_Tunnel#Maintenance