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Old 02-20-2012, 05:01 PM   #1
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digging under sidewalk


I need to tunnel under my sidewalk to get a couple cables under it. what's the easiest way to do this when the ground's frozen?

tnx,
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Old 02-20-2012, 10:12 PM   #2
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digging under sidewalk


you can generally use your water hose and a straight garden sprayer. dig a small hole for start and access a few inches below side walk. turn on sprayer to jet and let the water begin blasting a hole as the hole gets bigger keep feeding the hose in and out to continue blasting a hole. once on the other side just shove a pvc pipe throughfrom one end to the other. if this a much larger side walk i use the hose and sprayer dig a starter hole and a larger finnish side hole and feed the hose through a pvc pipe to guide the hose straighter working the hose in and out a few inches at a time through the pvc pipe. as the hole continues forward feed the pvc in further untill you reach the other side. let the water settle out then feed your lines through. hope this helps.
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Old 02-20-2012, 10:29 PM   #3
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digging under sidewalk


I made up a simple tool just for this, a piece of 3/4" PVC pipe with a ball valve and a garden hose adapter.
I dig a pit next to the walk for all the extra water and dirt to fall into.
If you hook up the the drain vale on the water heater it will clean out the bottom of the heater and give you hot water to thaw out the ground faster.
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Old 02-22-2012, 10:38 AM   #4
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digging under sidewalk


I found putting a cap with a couple holes drilled into on the end focuses the water stream and concentrates the pressure. Same idea though. I've always used galvanized pipe and end drilled end cap. I guess SCH 80 PVC would work. The nice thing about galvanized is you can keep adding lengths if you need to get under a driveway or something. Then again, a length of PVC and an end cap for your immediate task at hand is not going to break the bank.

You might need to wait until it thaws if the ground is frozen solid. You sure it is all the way under the depth of the sidewalk? A solid 6" soil freeze is a lot? Been awhile since I lived in the Rockies and my cowboy years---age 9 and 10.

Last edited by user1007; 02-22-2012 at 10:41 AM.
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Old 02-22-2012, 11:53 AM   #5
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digging under sidewalk


Quote:
Originally Posted by analogmusicman View Post
I need to tunnel under my sidewalk to get a couple cables under it. what's the easiest way to do this when the ground's frozen?

tnx,
Ayuh,... How big are the cables,..??

Run a saw across the walk, stuff the cables into the crack, 'n caulk over 'em...
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Old 02-22-2012, 11:56 AM   #6
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digging under sidewalk


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Ayuh,... How big are the cables,..??

Run a saw across the walk, stuff the cables into the crack, 'n caulk over 'em...
don't want to do that but tnx for the advice anyway!

tnx,
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