golfer2
Geotechnical
- Jan 22, 2005
- 2
I am a drainage contractor looking for info on backfilling seepage drainage on downhill slopes in a heavy rainfall area in the mountains. Sand backfill is required to meet the particle size requirements of the native soil. Trenches will be 2 to 3 feet deep. Our plan is to place the sand in sand bags to cover the seepage drainage, and backfill the top portion of the trench with compacted native soils. Trenches would be sodded and anchored with sod staples. I am concerned however on the 20 and 30 degree slopes that the recompacted native soils would still tend to erode. Are there other things I can do in the backfill process to help stabilize the trenches?
If a trench was filled with just sand, would the erosion start in the bottom of the trench as the sand column saturates, or at the top of the trench from surface water velocity?
If a trench was filled with just sand, would the erosion start in the bottom of the trench as the sand column saturates, or at the top of the trench from surface water velocity?