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#36683 - 04/12/04 07:58 AM OT: If you need to make a big hole
C-H Offline

Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
When you need to make holes for LARGE conduit:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=3284949854

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#36684 - 04/12/04 08:32 AM Re: OT: If you need to make a big hole
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
Cool I will take two.

A private tunnel from my house to the main highway would be nice.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

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#36685 - 04/12/04 02:14 PM Re: OT: If you need to make a big hole
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
Is this for real?! Looking at the bidding there seems to have been a lot of administrative cancelations.

 Quote:
Local pickup only (no postage)

Aw gee..... A little too big for the FedEx van, eh?

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#36686 - 04/13/04 08:42 AM Re: OT: If you need to make a big hole
SvenNYC Offline
Member

Registered: 08/19/02
Posts: 1685
Loc: New York City
Wonder why the museum is selling it and why it hasn't been used by the construction company for other tunnel digging projects?

It seems to be too expensive and complicated a piece of machinery for it to have only been used once.

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#36687 - 04/13/04 09:26 AM Re: OT: If you need to make a big hole
NJwirenut Offline
Member

Registered: 09/15/01
Posts: 816
Loc: Bergen County, NJ
That is only a small part of a TBM machine, namely the cutter head.

The entire machine includes equipment for generating power, moving the cutter forward, laying tracks, evacuating excavated material, and installing concrete tunnel support sections as digging progresses.

The TBMs actually used for digging the main channel tunnel are still underground, AFAIK. As the tunnel is lined with concrete behind the machine as it digs, the tunnel is too small to allow the machine to back out after digging. At the conclusion of digging, the machines were steered off to the side of the main tunnel, and abandoned in place.

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#36688 - 04/13/04 09:45 PM Re: OT: If you need to make a big hole
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI

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#36689 - 04/13/04 10:59 PM Re: OT: If you need to make a big hole
Lostazhell Offline
Member

Registered: 02/21/04
Posts: 1248
Loc: Bakersfield, CA (Originally Or...
Hey I think I was supposed to order one of those! Along with a wire stretcher & some skyhooks!

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#36690 - 04/14/04 03:37 AM Re: OT: If you need to make a big hole
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
A tunneling shield was used many, many decades ago to dig the deep-level "Tube" lines of the London Underground as well.

For anyone touring this part of the world, I can thoroughly recommend using the Channel Tunnel. It's much smoother and quieter than either the London Underground or the New York Subway, and very quick.

All the formalities are handled at the boarding end, so if you're going through with your car you just drive off the train at the far end and straight out onto the motorway/autoroute.

Great if you're not a good sailor, like me!

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