Seepage from pits
Seepage from pits
(OP)
I am working on a project which is an old manufacturing facility that is being dismantled, with everything being brought down to grade. The facility contains many u-drains and pits, which will remain in place, and will be backfilled. The contractor is planning to put holes in the bottom of the pits so that they don't fill with water when it rains.
They are looking for me to tell them how big to make the holes, and how far apart, and I have no idea.
Any suggestions?
Thanks in advance!
They are looking for me to tell them how big to make the holes, and how far apart, and I have no idea.
Any suggestions?
Thanks in advance!





RE: Seepage from pits
RE: Seepage from pits
RE: Seepage from pits
how big are these "pits" ?
if they are small - how will you get compaction inside of the small pit? they may need to use lean concrete to backfill the smaller ones which will eliminate the water problem. By U-drain, do you mean trench drain? they should be filled with lean concrete, otherwise removed.
Also, if they are well below the finish surface, will it matter if they do fill with water? Provide a minimum of two holes per pit, one at each end. Any convenient size obtainable with a jack hammer.
RE: Seepage from pits
f-d
¡papá gordo ain't no madre flaca!
RE: Seepage from pits
RE: Seepage from pits
RE: Seepage from pits
We went with filling the smaller pits and trench drains with lean concrete, and for the larger pits, putting in an approx. 6" diameter hole about every 20 sf.
That should give them a pretty reasonable cost estimate.
Thanks to all of you for your help!