graded gravel fill under placed soil
graded gravel fill under placed soil
(OP)
Hello,
I currently work in land restoration to woodland. We usually specify placement of up to 2 m depth of soil over landfill or capped sites to allow for planting trees (according to drought and rainfall data for the particular site). I would like comments, please, or some idea about the suitability of a layer of gravel fill placed below the soil to improve drainage. What sort of grade fill would be required and would geotextiles be necessary to prevent infill by soil? I'm envisaging a gravel layer of approx 0.3 m thick would be appropriate. The soils used can range from fine sands to silts to clays and are usually placed by loose tipping to minimise compaction.
Thanks in anticipation.
I currently work in land restoration to woodland. We usually specify placement of up to 2 m depth of soil over landfill or capped sites to allow for planting trees (according to drought and rainfall data for the particular site). I would like comments, please, or some idea about the suitability of a layer of gravel fill placed below the soil to improve drainage. What sort of grade fill would be required and would geotextiles be necessary to prevent infill by soil? I'm envisaging a gravel layer of approx 0.3 m thick would be appropriate. The soils used can range from fine sands to silts to clays and are usually placed by loose tipping to minimise compaction.
Thanks in anticipation.





RE: graded gravel fill under placed soil
RE: graded gravel fill under placed soil
RE: graded gravel fill under placed soil
Each site is different, however, if the landfill or cap is meant to act as an impermeable layer, then you wouldn't want any water draining into or out of landfill.
I have found that without a proper impermeable layer, the trees have more opportunity to draw up some of the unwanted moisture (contaminated) and sometimes cant survive.
RE: graded gravel fill under placed soil
RE: graded gravel fill under placed soil