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Gonemad Since: Oct, 2015
Jan 19th 2024 at 11:33:40 AM •••

Tunnel Boring Machines or TB Ms, are Awesome, but Impractical drills. The terrain must be soft enough to be cut by the usually Diamant-studded hardened heads, but stable enough to dig at least a couple of meters without collapsing over the machine head. Too hard rocks would mean the machine can't progress without damaging the cutting heads, too soft and the tunnel would collapse constantly over the machine, endangering itself and the personnel on it.

The gap created by the head is then is covered with shotcrete, as in, a mass of concrete is ejected at high pressure to adhere to the walls, and then several circular slabs of pre-shaped concrete are attached to each other and the previous layer until a ring is formed. Then a section of rails is added to the bottom, exactly because the TBM lays on train tracks, and the process resumes.

It is easy to align the machine with a laser light guide, given that the machine can steer the drilling head with hydraulic actuators, to make turns, and changes in elevation.

If the terrain conditions are perfect for TB Ms, they are the safest, most efficient way to dig a tunnel. Drilling holes and using explosives on harder terrain is extremely dangerous and labored work. Terrain that is too soft even for TB Ms is usually dug with other methods.

Looking up close, the cutting head doesn't even look like a hand-operated drill, they look a collection of giant rollers or hammers. Have a look here:

https://www.akkerman.com/equipment/tbm-cutter-head-attachments/

Edited by Gonemad
AntMan Since: Mar, 2013
Jun 30th 2017 at 12:19:03 PM •••

"Iron Man's suit has a specialized armor made for tunneling that has its forearms transform into drills. Considering that Tony managed to dispatch a bunch of Mecha-Mooks with them they are also pretty effective weapons."

When did he use that one? All i know is the giant Argonaut suit (which used repulsors instead of a drill) and the animated series one (which if that's it, then this really shouldn't be under comics)

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Larkmarn Since: Nov, 2010
Jun 30th 2017 at 12:26:54 PM •••

Googling says the original suit had a drill and the second suit both had hand drills.

I'd say that it's a general example since there's Animated, Film, and toy-exclusive armors that all have drill hands, but the fact they're citing a specific example makes me figure he's either referring to a specific one or the animated series.

Found a Youtube Channel with political stances you want to share? Hop on over to this page and add them.
SotiCoto the One Man Riot Since: Apr, 2009
the One Man Riot
May 31st 2012 at 3:43:19 AM •••

Didn't this page used to have a TTGL image on it (the obvious choice)?

Is there some sort of bizarre initiative to change all the images on the site to more obscure ones lately? I've noticed quite a lot of images have been subbed out in favour of less reputed* alternatives.

(* = Often sub-par dreck.)

"Do what thou wilst shalt be the whole of the law." ~ Aleister Crowley Hide / Show Replies
Telcontar MOD Since: Feb, 2012
May 31st 2012 at 4:55:39 AM •••

Is the image you're thinking of this one? It was changed in Nov. 2010. Personally, I think the current image illustrates the trope better.

No, there isn't; the only initiative there is is to make all the images better and clearer. If that means changing them to more obscure stuff, fair enough.

That was the amazing part. Things just keep going.
JProllz Professional Newbie Since: Oct, 2009
Professional Newbie
Oct 25th 2011 at 1:24:12 PM •••

But you don't screw screws with drills...

Edited by JProllz Specialty: Laser Guided Spellchecks on blatant misspellings. No that's not a trope. Hide / Show Replies
TARDISES Since: May, 2011
Jan 6th 2012 at 2:40:10 PM •••

I want to see a drill attached to the sonic screwdriver now... just to prove you wrong.

108.3.228.164 Since: Dec, 1969
Aug 7th 2010 at 8:39:04 PM •••

Anyone have a larger version of the page image?

Koveras Mastermind Rational Since: Jan, 2001
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