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Old 08-12-2008, 03:37 PM   #1
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Tunneling PVC under a driveway


I'm wanting to put in a lawnbelt sprinkler system on the other side of my 15ft driveway whats the best way to tunnel it out under the driveway

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Old 08-12-2008, 03:47 PM   #2
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Tunneling PVC under a driveway


If you can tolerate the mess, and your local dirt allows it (sand, sandy loam, light clay), you can dig a hole on one side deep enough to get below the compacted base, and out far enough to insert a 16' piece of PCV.

Attach a hose , crank it up and hydro drill it.

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Old 08-12-2008, 03:58 PM   #3
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Tunneling PVC under a driveway


Thanks for the quick response I heard about this just wasn't sure if it would work on a 15ft driveway.
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Old 08-12-2008, 04:03 PM   #4
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Tunneling PVC under a driveway


If you have rocks or caliche, it won't.
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Old 08-17-2008, 09:14 PM   #5
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Tunneling PVC under a driveway


I used the hydro-drill trick going under a 3 ft sidewalk. We dug out about 2 ft away from the sidewalk, so we 'drilled' about 6-7 ft total. Worked great.
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Old 08-17-2008, 09:24 PM   #6
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Tunneling PVC under a driveway


I agree it does work if the soil will allow it. BOB
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Old 08-18-2008, 06:34 AM   #7
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Tunneling PVC under a driveway


Quote:
Originally Posted by Tscarborough View Post
If you can tolerate the mess, and your local dirt allows it (sand, sandy loam, light clay), you can dig a hole on one side deep enough to get below the compacted base, and out far enough to insert a 16' piece of PCV.

Attach a hose , crank it up and hydro drill it.
Trying to hijack here

How far into the PVC pipe does one keep the hose when you are "drilling"? Also, does one just keep constant pressure on the end of the PVC to move it?
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Old 08-18-2008, 07:55 AM   #8
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Tunneling PVC under a driveway


if the pipe is 1" what i did, I took an old tire tube and clamped it to the end of the pipe and the other end to the garden hose keeping the hose close to the pipe. then kept sliding the pipe back and forth to help remove the soil from the pipe. its very easy to do just keep the pipe fairly level or you will be drilling deeper then expected. BOB
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Old 08-18-2008, 08:27 AM   #9
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Tunneling PVC under a driveway


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Originally Posted by buletbob View Post
if the pipe is 1" what i did, I took an old tire tube and clamped it to the end of the pipe and the other end to the garden hose keeping the hose close to the pipe. then kept sliding the pipe back and forth to help remove the soil from the pipe. its very easy to do just keep the pipe fairly level or you will be drilling deeper then expected. BOB
Sorry for being slow.. but could you show a diagram? I am not understanding a few things and a diagram would be great. I am trying to understand:

1. Purpose of tire tube?
2. Where is the material going when it breaks loose if the hose is clamped to the pipe? Do you keep pulling the pipe all the way out of the hole every couple of minutes?
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Old 08-18-2008, 03:38 PM   #10
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Tunneling PVC under a driveway


let me walk you through the set up and use. take a bicycle tube and stretch it over the end of the PVC pipe and then install the other end over the hose end. take two hose clamps and clamp the tube to the pipe and the end of the hose. then wrap some duck tape over the middle section of the clamps. the as the other poster stated dig a trench where you want the run of the pipe to start. take the pipe with the water on pointing it at your entree point holding it while having the water blow the soil away.
then.
this process will only work in certain soils as the other poster stated.
if you come to a point where the pipe does not want to go any further then pull the pipe out let the hose wash out the area and start pushing the pipe back in. Hope this helps. BOB

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