Pipe under entrance walkway

[Splicer]

What would be the easiest fastest best method to pull/push/place 4" schedule 40 pipe under an existing (tho new build) entranceway walk? It needs to go about 3 feet. I don't want to mess with the weight integrity of the sidewalk by digging but may have no choice?:confused:

[Wet_Boots]

If the walkway is concrete, you can dig under it without much worry. Concrete seems to support its own weight no matter what.

[Splicer]

If the walkway is concrete, you can dig under it without much worry. Concrete seems to support its own weight no matter what.
But over time what about settling/collapse? Thanks for respondng...What about the weight of refrigerators (as an example)?

[Wet_Boots]

I just don't see many/any collapsed concrete sidewalks, and never any where I've jetted (water power) a pipe or two under a concrete walkway. And I know I left some airspace under there. Maybe it just works out that a sidewalk thick enough to not crack on its own will stand up to being tunneled under. If the walk is only three feet wide, you could easily backfill/pack some gravel or sand around your sleeve.

[bumper]

It clings to 3/8" rebar like ugly clings to an ape

[Dirty Water]

Concrete has a lot of structural integrity due to the rebar reinforcement. The worst that may happen will be a hairline crack on the surface directly under where you dug.

Asphalt, on the other hand, should be bored in such a way that you will not leave any voids.

We have dug under many many sidewalks by hand.

[Avery]

Wash or blow it through.

[Dirty Water]

Wash or blow it through.

You guys are lucky that it works there. We have so many rocks up here that the only option is to dig or bore it.

[Splicer]

Wash or blow it through.
:confused: :confused: :confused:

[Kartanimal29]

You should have no problem tunneling under a concrete walk. Vermeer make a hammer mole if you want to go that far. We have a 2.5 and a 4 in. mole, they work great just as long as it's not sandy or rocky.

If you have to dig it by hand, make sure you dig back about 5 ft from the walk,both sides, to insure you get a straight shot to the other side. Just dig half way on one side then go to the other side and finish.
I take about three shovel full's of dirt a throught it under the walk. Then I take a sledge hammer and pack it in. or you could use your toe of your boot.

AndersonTurfIrrigation.com

[Oxmow]

We also use a trench on both sides and a sharpshooter from both sides. Pack what dirt you can back in around the sleeve. No worries.

[ESprinklers]

Try using something like a Borit, it comes with a 4 3/4" reemer bit that works pretty good for larger pipe sleeves. Just bore through the first time with the 2 or 3 inch bit, then swap out to the 4 3/4" reemer bit on the other side and pull back through.

[Splicer]

Sorry...should have updated y'all:o ...

I put the 4" schedule 40 pipe under the sidewalk...ended up having to dig it out as it was all 57 rock and sand...could only knock the pipe thru probably 3"-4" in the center...then I packed all the rock/sand I could back in the hole...jumped on the sidewalk and no flex so I think it will be fine...

Thanks for all the advice:clapping: :drinkup: :usflag:

[HooKooDooKu]

You guys are lucky that it works there. We have so many rocks up here that the only option is to dig or bore it.

I've got a bunch of nasty rocks and clay in my yard, but I've been able to blast my way under sidewalks. Now granted at least one of those was with a 2000+psi pressure washer.