Dropping a large, and heavy, tamper from great heights to densify soil deep in the ground. Also the topic of my term paper.
http://www.youtube.com/watch?v=c4rpjgi4Heo
http://www.youtube.com/watch?v=850v8Q819S4
http://www.youtube.com/watch?v=F7S3ABB6boU&feature=related

As cool as that is, it isn't as cool as Blast compaction.
http://www.explosivecompaction.com/videos/Blast.wmv

4/26/2010 10:45:55 PM

interesting...tell us less

4/26/2010 10:48:31 PM

I've seen much worse:
http://www.youtube.com/watch?v=yiuUYLr_f3w

4/26/2010 10:50:03 PM

shut up cheetoFinger

4/26/2010 10:51:41 PM

It would probably be easier [and cheaper] to tell your mom to take a walk over the geographic area needing a treatment.

4/26/2010 10:51:53 PM

no u

4/26/2010 10:51:56 PM

...aka dropping a big weight on the ground.

4/26/2010 11:16:38 PM

suitable replacement for my tamping iron

4/26/2010 11:27:56 PM

ive been doing DCPs all week last week and now this week

4/26/2010 11:36:45 PM

^Did some on the Duke baseball field last Thursday and Friday.

4/26/2010 11:38:48 PM

my traps are going to be nice lookin for summer if this keeps up

4/26/2010 11:40:02 PM

I don't think I've ever done DCPs in a footing though.

4/26/2010 11:41:28 PM

really? damn, thats mostly where i have to do them. the only time i didnt was one summer when it was 106 degrees out and i got sent to this old subdivision that never got developed and i had to do 3 per lot. i was really thinking of quitting that day

4/26/2010 11:47:37 PM

Maybe one time. It was coastal plains deposits and we didn't have a geotech report to go by.

Most of the stuff we do is Raleigh belt, Durham Triassic, and Carolina Slate belt. Typically the footing subgrade elevation is on or into residual soil.

The most I've ever a approved a footing for is 8,000 psf in Durham on the weathered rock and 22.5 tsf for a cassion deeper into the same stuff.

4/26/2010 11:51:01 PM

haha wow, bet that was fun

4/26/2010 11:53:53 PM

message_topic.aspx?topic=592830

4/27/2010 12:31:19 AM

I bet you get some lucrative contracts for this stuff!

4/27/2010 12:35:03 AM

And here i thought that this was the leading cause of chronic constipation among homosexuals.

Of course, their asses are probably filled with montmorillonite or smectite which leads to seasonal cracking of their anal foundations.

4/27/2010 12:43:33 AM

^Breaking out clay mineralogy. I like it.

4/27/2010 1:23:53 AM

2:1 expansive, no less.

4/27/2010 1:51:24 AM

^^^ nope, not really. Not enough fiber in their diets, maybe.

4/27/2010 6:51:02 AM