Puhoi Drill No.1

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#123006 - 02/20/06 12:03 AM

Puhoi Drill No.1

Trumpy

Member

Joined: Jul 2002
Posts: 8,217
SI,New Zealand

Photo's and info submitted by RODALCO:

Quote

This is the drill used for the SH 1 tunnel from Waiwera going north to Puhoi, New Zealand.
Drilling commences from the North end, drilling towards Waiwera.
Starts formally on 20th Feb. 2006.

Drill machine. runs on 3Ø 1050 Volts ac:

[Linked Image]

Name-plate details from supply transformer:

[Linked Image]

Drill bit, about 1.2 meters in diameter, note water jets for cooling:

[Linked Image]

Drill bit:

[Linked Image]

Let's face it, these days if you're not young, you're old - Red Green

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#123007 - 02/20/06 12:10 AM

Re: Puhoi Drill No.1

Trumpy

Member

Joined: Jul 2002
Posts: 8,217
SI,New Zealand

More pics:

Rear of drill machine:

[Linked Image]

Side of drill machine:

[Linked Image]

Close up of cutter:

[Linked Image]

Drill nameplate:

[Linked Image]

Thanks Ray. [Linked Image]

Let's face it, these days if you're not young, you're old - Red Green

#123008 - 02/20/06 10:50 AM

Re: Puhoi Drill No.1

Dave T

Member

Joined: Jan 2005
Posts: 155
Waukesha, WI, USA

Good stuff. Things that most don't get to see.
Thanks,
Dave

#123009 - 02/21/06 02:47 PM

Re: Puhoi Drill No.1

John Crighton Offline

Member

Joined: May 2005
Posts: 177
Southern California

+1 thanks for sharing these.

I gotta ask... is that drill head decorated? Or is there a purpose for all those welded-on lines and dots?

#123010 - 02/21/06 05:10 PM

Re: Puhoi Drill No.1

Trumpy

Member

Joined: Jul 2002
Posts: 8,217
SI,New Zealand

John,

Quote

I gotta ask... is that drill head decorated? Or is there a purpose for all those welded-on lines and dots?.

Them lines are what what is known in the welding trade as hard-facing.
It's put on there to postpone wear to the actual surface of the cutting head.
Excavator buckets and bulldozer blades typically have the same thing.
It's done by running a bead of weld from a special hard-facing welding rod all over the surface to build it up.

Let's face it, these days if you're not young, you're old - Red Green

#123011 - 02/21/06 06:33 PM

Re: Puhoi Drill No.1

John Crighton Offline

Member

Joined: May 2005
Posts: 177
Southern California

"Hard facing" -- Hardly a day goes by that I don't learn something here. Thanks!

#123012 - 02/26/06 12:26 PM

Re: Puhoi Drill No.1

HighPotter Offline

Member

Joined: Aug 2004
Posts: 42
So. Cal

VERY cool pictures !

I can only assume that SH-1 is a roadway?
If so, does that mean that the drilling "arm" adjust up-down-sideways ? as the drilling is performed.?

Although the drill is pretty big, not as large as a roadyway tunnel. I'm curious.

HP

#123013 - 02/26/06 12:53 PM

Re: Puhoi Drill No.1

Radar

Member

Joined: Apr 2004
Posts: 349
Los Angeles, CA

Quote

Although the drill is pretty big, not as large as a roadyway tunnel.

Another little light just blinked on. Just this past week we started twin tunnel boring in East Los Angeles. We have 2 TBM's (tunnel boring machines), each about 21' diameter. I'll see if I can get some pictures together during the week.

Radar

There are 10 types of people. Those who know binary, and those who don't.

#123014 - 02/26/06 07:49 PM

Re: Puhoi Drill No.1

HighPotter Offline

Member

Joined: Aug 2004
Posts: 42
So. Cal

wow ! 21 feet? Where in East LA would this be? Sewer line? I didnt think there were anymore subway projects going on.

HP

[This message has been edited by HighPotter (edited 02-26-2006).]