Re: Micro Trenching for Fiber Optic Deployment

[Adrian <choprboy () dakotacom net>]

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