Effective Compaction Depth
Effective Compaction Depth
(OP)
Hello,
General request for opinions on the following:
I work for a local geotech firm that services areas in the upper to lower coastal plains of SC. We typically run into sites that require the upper XX amount of cleaner sands (SP to SP-SM/C) to be "densified in-place". My general thought on this is that this is really only applicable for sites that have soils below or near optimum especially for soils dirtier than 12% fines.
Am I crazy to think that a contractor can essentially moisture condition (flood clean sands) areas that we need to consolidate and vibratory roll in soils with 26 ton smooth drum then back check the "densification" process with a DCP and proofrolling? For an example of 3 feet below grade, is it a pipe dream to think I will get compactive effort at this depth? Subgrade soils are predominantly a medium SP-SM below optimum supporting very light loads.
Thanks J
General request for opinions on the following:
I work for a local geotech firm that services areas in the upper to lower coastal plains of SC. We typically run into sites that require the upper XX amount of cleaner sands (SP to SP-SM/C) to be "densified in-place". My general thought on this is that this is really only applicable for sites that have soils below or near optimum especially for soils dirtier than 12% fines.
Am I crazy to think that a contractor can essentially moisture condition (flood clean sands) areas that we need to consolidate and vibratory roll in soils with 26 ton smooth drum then back check the "densification" process with a DCP and proofrolling? For an example of 3 feet below grade, is it a pipe dream to think I will get compactive effort at this depth? Subgrade soils are predominantly a medium SP-SM below optimum supporting very light loads.
Thanks J





RE: Effective Compaction Depth
RE: Effective Compaction Depth
RE: Effective Compaction Depth
i wouldn't make a practice of using a DCP to check for compaction on new projects. it is too easy to pin the blame if something bad happens and project specs rarely recognize the DCP test. the DCP is more of a tool when you're doing forensic work when the test has no effect on the quality of the work. or the DCP can be used to supplement the compaction testing program.
RE: Effective Compaction Depth
Most definitely understand what you are saying about the use of a dcp. I'll probably just beat a proctor and do test pits/tubes/sand cone to verify at some frequency and dcp in betweeen etc. Man that is wild you were using a sheeps in clean sand, I've never seen that before!
J
RE: Effective Compaction Depth
RE: Effective Compaction Depth
RE: Effective Compaction Depth