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Anonymous
2016-02-15 18:47:10 Post No. 946996
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Anonymous
2016-02-15 18:47:10
Post No. 946996
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lets say i want to dig a soakaway for storm water, not poo water.
soil is clay so doesn't drain well.
dug a hole in the garden to just about 4 meters deep to get through the clay and it drains fine.
popular method seems to be fill the hole with broken bricks and shit but this seriously reduces void area and draining capacity.
i have seen milk crate type attenuation cells but wrapping in sheet and burying sounds like a bad idea, how long until it gets blocked?
my personal preference is something like pic related.
issue is cost, to get rings with holes drilled, delivered then craned into the bottom of the hole is very expensive.
so now to the question /diy/
i want to pour a perforated concrete shaft myself. how do i calculate the wall thickness so it doesn't turn into a grave.
i have had a google around but i can't find any relevant standards, just existing sized pcc sections with no values as to the mix or safe depth etc.
thanks!