Rockfill placement on bedrock with water
Rockfill placement on bedrock with water
(OP)
Hi all,
I´m looking for helpful tips or comments on the placement of rockfill (-75mm) ontop of clean bedrock, which is quite uneven (+/- 1 m or so). Due to site conditions, water is covering much of the bedrock. Draining the "pond" is not working effectively due to groundwater flow.
The question is: does placing and compacting this rockfill "underwater" in lifts of around 300 mm have negative effects on the properties of the fill compared with if there was no water?
best regards,
Throstur
I´m looking for helpful tips or comments on the placement of rockfill (-75mm) ontop of clean bedrock, which is quite uneven (+/- 1 m or so). Due to site conditions, water is covering much of the bedrock. Draining the "pond" is not working effectively due to groundwater flow.
The question is: does placing and compacting this rockfill "underwater" in lifts of around 300 mm have negative effects on the properties of the fill compared with if there was no water?
best regards,
Throstur





RE: Rockfill placement on bedrock with water
RE: Rockfill placement on bedrock with water
The water is not 2m deep. Maximum depth of around 600 mm meaning the compactor can easily operate on the layer in the water with vibration. The material that's being used is fixed and will not be altered, i.e. max size 75mm.
I'm just wondering whether the effect of the compaction is poor when the rockfill layer is completely saturated in water since foundations will be placed ontop in the near future. Do we absolutely need to drain the water before place the fill?
RE: Rockfill placement on bedrock with water
RE: Rockfill placement on bedrock with water
The compactors are 15-19 (metric) tons so they actually compact to some depth - that´s true.
Thanks for your comments BigH,
RE: Rockfill placement on bedrock with water
RE: Rockfill placement on bedrock with water
Good luck.