We may have a job replacing steel pipes which stick out of the ground about 4′ and are filled with concrete they out line a parking lot. They are rotted at the base and can be knocked over easily leaving the remainder in the ground.
I thought we would be able to drill out the old concrete then slip a jig down the hollow pipe and pull it out of the ground. Then we could use a bar to breakup the remaining concrete and replace the steel and concrete anew.
We want to try to avoid damageing the blacktop as much as possible.
Any ideas. THANKS.
Replies
Some pipes like that have either a piece of rebar welded cross-wise or have the pipe slightly deformed in the concrete, which would pull the concrete up thru the blacktop.
If the stub only sticks up a few inches, how about just banging then down to below blactop level with the backside of a backhoe shovel? Have done that successfully with a block on top the pipe stub for the backhoe to bang on .
Junkhound,Good idea, except the OP said he had a job "replacing" the posts. Seems like the new ones might need to be in the same location as the old ones.How about a generous sawcut in the blacktop and pull up the bolus afterwards?Bill
new pipes can go in off to one side
If they're set in concrete and the concrete is sound get someone to come and rebore it larger than the pipe. Set the new pipe with hydraulic (expanding) mortar.
Is it possibe to go up a pipe size? If so, you could just drive the larger pipe over the old pipe.