Micro Trenching for Fiber Optic Deployment
Does anyone have experience in running fiber optic cable with micro-trenching techniques in areas where there is no existing asphalt or concrete roadway, just packed earth and rock? Environmental limitations do not allow for constructing an aerial power pole alignment, or underground ductbank. The distance is about 10 kM. David
I would think that in such a deployment scenario, microtrenching might not be the best bet. Part of the appeal (IMO) of microtrenching in existing pavement is that once filled, the pavement slab provides for some protection and rigidity. If making a small trench into packed dirt, you're much more susceptible to accidental cuts and erosion. I would suggest a Ditch Witch or similar trencher and laying some ABS/PVC conduit could give some protection from small nicks and cuts, and allow for future strands to be pulled along your path. Cheers, jof On Mon, Feb 11, 2013 at 10:34 AM, david peahi <davidpeahi@gmail.com> wrote:
Does anyone have experience in running fiber optic cable with micro-trenching techniques in areas where there is no existing asphalt or concrete roadway, just packed earth and rock? Environmental limitations do not allow for constructing an aerial power pole alignment, or underground ductbank. The distance is about 10 kM.
David
On Monday 11 February 2013 11:34, david peahi wrote:
Does anyone have experience in running fiber optic cable with micro-trenching techniques in areas where there is no existing asphalt or concrete roadway, just packed earth and rock? Environmental limitations do not allow for constructing an aerial power pole alignment, or underground ductbank. The distance is about 10 kM.
My best guess is that you would want to use directional boring in that case. A small hole every couple hundred meters, horizontal bore and duct pullback between holes. No personal experience here other than watching it being done for new pulls into existing developments. No need for digging up yards/sidewalks/parking lots, just a bunch of potholes at the new junction box locations and a single horizontal bore down the property line from the street, intercepting each of the potholes. Adrian
concrete roadway, just packed earth and rock? Environmental limitations do
My best guess is that you would want to use directional boring in that case. A small hole every couple hundred meters, horizontal bore and duct pullback
You'll struggle to get a directional drill through material that includes rock. It's two days work for this kit http://www.youtube.com/watch?v=acTBl8UKNaQ John
On Monday 11 February 2013 16:36, John Lyons wrote:
concrete roadway, just packed earth and rock? Environmental limitations do
My best guess is that you would want to use directional boring in that case. A small hole every couple hundred meters, horizontal bore and duct pullback
You'll struggle to get a directional drill through material that includes rock.
It's two days work for this kit
Depends on the material, thru hard and broken rock is definitely do-able with a horizontal bore and pneumatic impact head: http://www.youtube.com/watch?v=Sbn7rgUvFuI http://www.youtube.com/watch?v=hbksxTJLgCc Horizontal boring can be done with/without drilling fluid and with/without active drilling heads, depending on the conditions. The op was rather vague on the actual requirements, so we are all left guessing... I took "packed earth and rock? Environmental limitations do not allow... underground ductbank" to mean mixed earth and no open trenching or methods that would potentially cut aquifer plains allowed. I.e. running this theoretical fiber thru a national forest, trenching 6ft down with a wheel or cable plow and cutting all the tree roots in the path would be bad... Adrian
In New Zealand we used a tool behind a tractor that was normally used for laying PVC pipe. So if you were using an armored cable you might be able to get with doing something similar. Here is a video. Note the exact method but you can get the idea. http://www.youtube.com/watch?v=AI0vfIIgJBM On Mon, Feb 11, 2013 at 1:34 PM, david peahi <davidpeahi@gmail.com> wrote:
Does anyone have experience in running fiber optic cable with micro-trenching techniques in areas where there is no existing asphalt or concrete roadway, just packed earth and rock? Environmental limitations do not allow for constructing an aerial power pole alignment, or underground ductbank. The distance is about 10 kM.
David
Hi. You are thinking to small, you need to have space for the future: http://www.youtube.com/watch?v=10BKCsVxuIM Seriously, go with a vibrator plow or a chain trencher: Maybe a little small for a 10 km run: http://ditchwitch.com/trenchers-plows/walk-behind-vibratory-plow/410sx-vibra... This should be good: http://ditchwitch.com/trenchers-plows/ride-on/RT45-trencher/ On 2013-02-11 18:06, james jones wrote:
In New Zealand we used a tool behind a tractor that was normally used for laying PVC pipe. So if you were using an armored cable you might be able to get with doing something similar.
Here is a video. Note the exact method but you can get the idea. http://www.youtube.com/watch?v=AI0vfIIgJBM
On Mon, Feb 11, 2013 at 1:34 PM, david peahi <davidpeahi@gmail.com> wrote:
Does anyone have experience in running fiber optic cable with micro-trenching techniques in areas where there is no existing asphalt or concrete roadway, just packed earth and rock? Environmental limitations do not allow for constructing an aerial power pole alignment, or underground ductbank. The distance is about 10 kM.
David
-- Fredrik Holmqvist I2B (Internet 2 Business) 070-740 5033
participants (6)
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Adrian -
david peahi -
Fredrik Holmqvist / I2B -
james jones -
John Lyons -
Jonathan Lassoff