FORUMula1.com

[darwin dali]

Pretty amazing feat

[The_Stig_Money]

I have tunneled bigger holes

LOL

[What's Burning?]

This has been a momentous week for underground news! I'm still pulling for mole people as a capper!

[f1ea]

oh those Swiss..... the lengths they go to get noticed

[darwin dali]

oh those Swiss..... the lengths they go to get noticed

Considering it all began with the holes in their cheese...

[f1ea]

oh those Swiss..... the lengths they go to get noticed

Considering it all began with the holes in their cheese...

Good progress! they're catching up...

[madbrad]

I can't find the machine diameter anywhere in there. Apparently the Niagara Tunnel's machine is the largest diameter machine to date.

[darwin dali]

I can't find the machine diameter anywhere in there. Apparently the Niagara Tunnel's machine is the largest diameter machine to date.

http://en.wikipedia.org/wiki/File:TBM_S ... o_East.jpg

http://en.wikipedia.org/wiki/Gotthard_Base_Tunnel

And for the records: http://en.wikipedia.org/wiki/Tunnel_boring_machine

[madbrad]

I can't find the machine diameter anywhere in there. Apparently the Niagara Tunnel's machine is the largest diameter machine to date.

http://en.wikipedia.org/wiki/File:TBM_S ... o_East.jpg

http://en.wikipedia.org/wiki/Gotthard_Base_Tunnel

And for the records: http://en.wikipedia.org/wiki/Tunnel_boring_machine

OK then from that I surmise the machines ther ehave a diameter of somewhere between 29 and 31 feet. The Niagara tunnel's is 47.3 feet.

[What's Burning?]

I can't find the machine diameter anywhere in there. Apparently the Niagara Tunnel's machine is the largest diameter machine to date.

http://en.wikipedia.org/wiki/File:TBM_S ... o_East.jpg

http://en.wikipedia.org/wiki/Gotthard_Base_Tunnel

And for the records: http://en.wikipedia.org/wiki/Tunnel_boring_machine

OK then from that I surmise the machines ther ehave a diameter of somewhere between 29 and 31 feet. The Niagara tunnel's is 47.3 feet.

Are you saying girth is more important than length?

[darwin dali]

I can't find the machine diameter anywhere in there. Apparently the Niagara Tunnel's machine is the largest diameter machine to date.

http://en.wikipedia.org/wiki/File:TBM_S ... o_East.jpg

http://en.wikipedia.org/wiki/Gotthard_Base_Tunnel

And for the records: http://en.wikipedia.org/wiki/Tunnel_boring_machine

OK then from that I surmise the machines ther ehave a diameter of somewhere between 29 and 31 feet. The Niagara tunnel's is 47.3 feet.

I suppose so. However, they're building two(!) tunnels parallel, one rail track in each. They use 4 TBM's for all that, 2 coming from the south, 2 coming from the north and meeting very precisely underneath 1000's of meters of massive rock. The Niagara Tunnel has only one hole, a mere 140m underground and is considerably shorter.

[darwin dali]

I can't find the machine diameter anywhere in there. Apparently the Niagara Tunnel's machine is the largest diameter machine to date.

http://en.wikipedia.org/wiki/File:TBM_S ... o_East.jpg

http://en.wikipedia.org/wiki/Gotthard_Base_Tunnel

And for the records: http://en.wikipedia.org/wiki/Tunnel_boring_machine

OK then from that I surmise the machines ther ehave a diameter of somewhere between 29 and 31 feet. The Niagara tunnel's is 47.3 feet.

Are you saying girth is more important than length?

Naughty

[madbrad]

I am well aware of all the Niagara tunnel's pertinent figures. I wasn't claiming anything great about the niagara tunnel. I just wanted to spew a statistic. It has the biggest machine.

[darwin dali]

I am well aware of all the Niagara tunnel's pertinent figures. I wasn't claiming anything great about the niagara tunnel. I just wanted to spew a statistic. It has the biggest machine.

That's a claim you're making which is not really supported:

The largest diameter TBM, at 15.43 m, was built by Herrenknecht AG for a recent project in Shanghai, China. The machine was built to bore through soft ground including sand and clay. The largest diameter hard rock TBM, at 14.4 m, was manufactured by The Robbins Company for Canada's Niagara Tunnel Project. The machine is currently boring a hydroelectric tunnel beneath Niagara Falls, the machine has been named "Big Becky" in reference to the Sir Adam Beck hydroelectric dams to which it is tunneling to provide an extra channel of water to. A TBM has over 100 Titanium teeth.

[bud]

wow they dug a hole...