TBM at Headwall, the cutterhead is in the entry seal, the rings coming out the back are called blind rings and are pushing off the thrust frame.
Here is the kicker plate to get the gun set up where it can see the machine targets before mining starts.
BS is target between tunnel and exit seal.
FS is TBM target.
FS for navigation is controlled with an LED shutter, the system shoots two targets and calculates a vector between them to position the machine along with an inclinometer
Here is the navigation interface.
Here is the cab.
Here is the temp bracket for hanging from the crown with the first tunnel point, temporary control for mining purposes.
With the TS.
Making progress.
Now the machine is sunk and we can begin to build our control network.
Installing a catwalk bracket.
Painted and ready.
A post for the conveyor side, we have another style bracket for this side also but they are a pain to put up so I prefer these.
When installing an instrument or target on those fixed plates, does the 5/8"-11 bolt rotate, or is it fixed and you spin the tribrach down onto it? And since the tribrach footscrew adjustment will determine the HI, do you measure the HI each time, or is a minor difference in height not an issue for your application?
Jim Frame, post: 354560, member: 10 wrote: When installing an instrument or target on those fixed plates, does the 5/8"-11 bolt rotate, or is it fixed and you spin the tribrach down onto it? And since the tribrach footscrew adjustment will determine the HI, do you measure the HI each time, or is a minor difference in height not an issue for your application?
Tribrach is spun upon the fixed bolt, measure up is to target from top of plate, both sides with a metric stick tape, if you set up the gun before you get the MU you need to pop the top and measure to glass as the gun is too wide to get a vertical measure. Height is an issue, we first run a traverse and then hit the points with a digital level later.
Very interesting series of photos. Thanks for posting.
B A D A S S !
i'm interested in the "LED shutter". What is this and how does it work?
Thanks for all the photos!
squowse, post: 354587, member: 7109 wrote: i'm interested in the "LED shutter". What is this and how does it work?
Thanks for all the photos!
While mining the TS takes a continuous series of shots, first target 1, then target 2, or if 2 is blocked three, once it has two shots the position of the machine is calculated and another series of shots starts.
The "shutter" is to block the prism not being shot so that the gun does not pick up the wrong prism. They used to use a physical shutter like on a camera but now there is some LCD tech that blocks the prism when not in use then clears to open the shot.
LCD not LED, my error.
party chef, post: 354601, member: 98 wrote: While mining the TS takes a continuous series of shots, first target 1, then target 2, or if 2 is blocked three, once it has two shots the position of the machine is calculated and another series of shots starts.
The "shutter" is to block the prism not being shot so that the gun does not pick up the wrong prism. They used to use a physical shutter like on a camera but now there is some LCD tech that blocks the prism when not in use then clears to open the shot.
LCD not LED, my error.
Cool I had the exact same idea for our automated monitoring prisms. Some are very closely spaced (from the point of view of the instrument) and they can cause "bleed" or gross errors. Obviously I wasn't the first to think of it. (Like the Ipod)
If you have a manufacturer name or other details I would be very interested. How is the shutter triggered, radio?
The other "innovation" I would like is auto cleaning and defrosting of the prisms but this may be a bit harder to engineer.
Does Leica not have any active prism technology for this sort of application yet ?
pdop 1.0, post: 354632, member: 459 wrote: Does Leica not have any active prism technology for this sort of application yet ?
No, but if they did you would still need a mechanism for switching the active on and off.
I have considered if leds pulsing at the correct rate would work (for trimble). Could have a "mesh" radio system, bluetooth wifi etc.
Or maybe a receptor so that the instrument would fire a pulse of laser to "wake up" the target for say 20 seconds.
squowse, post: 354630, member: 7109 wrote: Cool I had the exact same idea for our automated monitoring prisms. Some are very closely spaced (from the point of view of the instrument) and they can cause "bleed" or gross errors. Obviously I wasn't the first to think of it. (Like the Ipod)
If you have a manufacturer name or other details I would be very interested. How is the shutter triggered, radio?The other "innovation" I would like is auto cleaning and defrosting of the prisms but this may be a bit harder to engineer.
The shutter is connected by cable to a computer. The system is made by a Japanese company called Enzan; http://www.enzan-k.com/contents/product-e/page/03.html similar systems are made by other companies mainly European such as Amberg; http://www.ambergtechnologies.ch/en/home/ and VMT http://vmt-gmbh.de/en/products-services/connect-technology/ among others.
I do not know how any of them would feel about selling system components and be aware that tunnel specific stuff tends to be a touch on the pricey side.
Now that.... Would be too much for my Javad LS! 🙂
Is this part of the Alaskan Way project in Seattle?
gschrock, post: 357286, member: 556 wrote: Nope. Bertha is a single 57 foot diameter bore. ... will probably need therapy when it is finally done.
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Bertha or you?
Gavin and party chef, keep on cooking!
dang.
The cutterhead was in the entry seal when I took the pictures at launch, here it is at the retrieval shaft where we mined into an existing station.
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57' diameter ? I was looking at that thinking that seems bigger than what it looks like in the photos, but this is just me trying to use objects in the foreground like the connex container or the temporary chain link fence to picture it.
Amazing project :good:
The 57' diameter is the Mega TBM being used on a Highway tunnel downtown, this is just a plain old 21' diameter TBM, we are mining twin tunnels for Light Rail.
:gammon: