tricountytrail
Well-known member
So what is the options on pouring concrete in post holes with excessive water in them?
Post hole and water question?
- Thread starter tricountytrail
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Kaizen
Well-known member
Do you think this is due to weather or a high water table? What post are you using?
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Shootinok
Well-known member
What are the posts for?
I don’t use concrete for fence posts and I did not want to put my pole barn posts below grade.
Everything I read during my research for my shop supported the idea that concrete around posts accelerated the decay. I have believed this for years on fences.
I put gravel in the bottom, then set the poles in the soils that were removed then I compact them.
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I don’t use concrete for fence posts and I did not want to put my pole barn posts below grade.
Everything I read during my research for my shop supported the idea that concrete around posts accelerated the decay. I have believed this for years on fences.
I put gravel in the bottom, then set the poles in the soils that were removed then I compact them.
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rustyjames
Well-known member
Pump out the water and pour, or use a tremie to pour.
OP
tricountytrail
Well-known member
they are for 6 x 6 glu lam posts for a 30 x 40 pole barn holes were dug and filled with water. it is on a stone pad normally dry. Plan was to pour some concrete at bottom next day place posts with rebar through base and pour more concrete and backfill.
Kaizen
Well-known member
Don’t think I’d want standing water under a support post. Any low areas you can drain it to? How deep is hole?
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matt_i
Well-known member
You can get a pond pump or bail them with a rope and a small pail. The latter isn't fun but can work. Assuming this is just rainfall/snowfall/precipitation.
Make sure your posts have correct rating for ground contact to preserve your investment. UC4B would be minimum, and I would try to source UC4C if I was building a post frame.
http://www.awpa.com/references/homeowner.asp
Make sure your posts have correct rating for ground contact to preserve your investment. UC4B would be minimum, and I would try to source UC4C if I was building a post frame.
http://www.awpa.com/references/homeowner.asp
HoosierMark
Well-known member
Why not use a shop vac to **** the water out?
Firebrick43
Well-known member
I imagine your using laminated treated lumber post? Gluelam are a distinctly different product that should never be in ground contact.
Concrete cures underwater. In fact the strength will be higher. High strength precast concrete products are cured under water such as bridge beams.
If you mix it correctly (don't make it to soupy) and pour and don't stir it once poured in the hole it will be fine. Wet concrete is placed all the time underwater for bridge abutments and piers. How do you think the key west bridges were done?
However why? Most throw a precast concrete cookie in the hole and set the post on that.
The post should not have concrete place around it. It will only accelerate rot.
If you have wet ground continuously and don't plan on tiling to the base of the hole I would encourage you to use permacolumns
https://www.permacolumn.com/
Pouring concrete around a wood post will only accelerate rot and do little if anything for pullout. And if the hole is inverted cone shape (as most dug holes are) it can lead to post jacking. The hole needs to be wider at the bottom than higher up.
Concrete cures underwater. In fact the strength will be higher. High strength precast concrete products are cured under water such as bridge beams.
If you mix it correctly (don't make it to soupy) and pour and don't stir it once poured in the hole it will be fine. Wet concrete is placed all the time underwater for bridge abutments and piers. How do you think the key west bridges were done?
However why? Most throw a precast concrete cookie in the hole and set the post on that.
The post should not have concrete place around it. It will only accelerate rot.
If you have wet ground continuously and don't plan on tiling to the base of the hole I would encourage you to use permacolumns
https://www.permacolumn.com/
Pouring concrete around a wood post will only accelerate rot and do little if anything for pullout. And if the hole is inverted cone shape (as most dug holes are) it can lead to post jacking. The hole needs to be wider at the bottom than higher up.
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