Tunnels!

Roads - Rails - Sidewalks - Bikeways
DanPatchToget
Nicollet Mall
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Re: Tunnels!

Postby DanPatchToget » March 22nd, 2017, 9:33 am

My professor in Norway told us about this in 2015. I guess if it makes the trip safer then props to them.

Quite amazing how many rail tunnels there are in Oslo, not just for the T-Bane (Metro) but also for regional trains. Makes me wonder what the public process is for these projects (if there are any) while here we can barely get through building a short tunnel for light rail trains (Kenwood).

talindsay
Wells Fargo Center
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Re: Tunnels!

Postby talindsay » March 25th, 2017, 9:36 am

Norway has insane amounts of oil money and a pretty homogenous and liberal population. Very different from here.

thatchio
Nicollet Mall
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Re: Tunnels!

Postby thatchio » March 26th, 2017, 11:29 pm

NOVA special on Cross Rail tunnel construction in London. http://www.pbs.org/wgbh/nova/tech/super-tunnel.html

mattaudio
Stone Arch Bridge
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Re: Tunnels!

Postby mattaudio » March 27th, 2017, 8:39 am

I'd like to see a similar special on the tunneling that Seattle has done for transit - Seattle seems to be alone in the U.S. in a) doing lots of new transit tunneling and b) being successful and below budget with it. Maybe Thatcher could be interviewed for it.

thatchio
Nicollet Mall
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Re: Tunnels!

Postby thatchio » March 27th, 2017, 11:33 pm

Ha, I'm not doing anything on the tunnels except trying to get TOD done adjacent a future tunnel station. Though we are trying to figure out how to better integrate transit infrastructure with stations, push for incidental uses, and think about how we have more direct connections between stations and communities and adjacent buildings.

I do know that the agency no longer references the names of tunnel boring machines and just calls them TBM 1 and TBM 2. People were getting to attached to them.

steve0257
Block E
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Re: Tunnels!

Postby steve0257 » April 1st, 2017, 6:33 am

mattaudio wrote:
March 27th, 2017, 8:39 am
I'd like to see a similar special on the tunneling that Seattle has done for transit - Seattle seems to be alone in the U.S. in a) doing lots of new transit tunneling and b) being successful and below budget with it. Maybe Thatcher could be interviewed for it.
The only tunnel I'm aware of currently under construction in Seattle is to replace the Alaskan Viaduct, and to say it has been successful and under budget is a bit of a stretch.

http://www.seattletimes.com/seattle-new ... 99-tunnel/

thatchio
Nicollet Mall
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Re: Tunnels!

Postby thatchio » April 2nd, 2017, 9:55 am

Steve, I think he's referencing the recently tunneled sections for rail. The Alaskan Viaduct project has not gone well and is an atypical project anyway, with the large diameter tunnel that went through some really sketchy soils (and got stuck).

The extension to UW was delivered under budget: http://www.soundtransit.org/About-Sound ... pitol-hill

The tunnel boring to extend the rail north of UW is also complete and now they're constructing cross passages and stations:
http://www.soundtransit.org/About-Sound ... ining-last

talindsay
Wells Fargo Center
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Re: Tunnels!

Postby talindsay » April 2nd, 2017, 3:34 pm

This is such a boring conversation.

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Anondson
Capella Tower
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Re: Tunnels!

Postby Anondson » April 9th, 2017, 8:31 pm

A few days ago Bertha broke through.

http://nypost.com/2017/04/04/worlds-lar ... =applenews

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Anondson
Capella Tower
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Tunnels!

Postby Anondson » April 9th, 2017, 8:36 pm

And for a much lighter boring topic, or maybe burrowing ...

http://www.sciencealert.com/this-massiv ... ega-sloths

Massive ancient tunnels in South America were burrowed by extinct giant sloths.


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