Super Soft Clay 6

[Kpaudel]

What is Super Soft Clay? can any one say about characteristic of this kind of soil? is this soil liquefy?

 

[Kpaudel]

I have also some comment on Canadian practices of evaluating capacity of single cast in-situ bored pile based on N value, I think that is suitable for dense coarse sand only, not suitable for loose sandy layer....are i'm correct?

 

[dgillette]

Kpaudel - You should sit down with a pot of coffee and study this:

http://cee.engr.ucdavis.edu/faculty/boulanger/PDFs/2004/Boulanger_Idriss_CGM04-01_2004.pdf

That's probably the best source on clay with cyclic loading available at present. If you have access to the ASCE Jnl of Geotechnical Engrg., look for a paper by Tim Stark and Ivan Contreras on the 4th Avenue slide in Anchorage, Alaska, in the same 1964 earthquake as the Turnagain slide that aeoliantexan mentioned, maybe 10 years ago. It may be referenced in that report I gave you the link for.

Interesting that the water content is greater than LL at such a great depth, with N ~ 8.

aeoliantexan - Are you in the town of Aeolian (Eolian?)? Must be windy there.

Regards,
DRG

 

[BZinfandel]

Dear Kpaudel since you've been using quite a large amount of testing methodologies and still searching for an answer, my humble opinion is that probably the equipment that would provide you with additional, and probably more reliable, data would be the SDMT. The Marchetti seismic and flat dilatometer is indeed the best piece of equipemnt you would consider in order to get mechanical behaviour of your soil in addition to Vs readings and to Kd. This latest parameter is only available from the SDMT and it refers to the horizontal stress index and is related with aging, pre-straining, cementation, consolidation...the history of your deposit. Kd is also rising an huge interest among all the most eminent researchers since during the latest ISC'4 held in Brazil last September, it has been demonstrated to be more suitable of any other parameter for CRR prediction.