Negative Skin Friction and SPT value
Negative Skin Friction and SPT value
(OP)
Hi, My name is Tim, I am currently working on a foundation design project concerning the negative skin friction. I used to think that the depth of NSF developed should extend to the whole soil layer described as marine clay. But I was told later that the SPT value would give a hint to choose the depth as a great SPT would mean the soil is stiff and firm and should be fully consolidated. I just want to ask if that is reasonable to say so. And is there any journals about SPT value and NSF having a relationships?
thx alot
thx alot





RE: Negative Skin Friction and SPT value
Go to www.geoforum.com and search for negative skin friction, there are a lot of helpful hints. You can also find some good papers there by fellinius.
RE: Negative Skin Friction and SPT value
But thanx for your advice
RE: Negative Skin Friction and SPT value
1. Have you run both undisturbed and remolded lab vane shear strength tests to estimate the soil's sensitivity?
2. What is the range in soil strength with depth? (Please use psf or pascal for units, not tsf or kPa.)
3. Where is the site?
4. What is the structure? What kinds of loads are being resisted? What are the consequences of foundation failure?
RE: Negative Skin Friction and SPT value
RE: Negative Skin Friction and SPT value
This is the problem with using Indnonesian Rupiah or Lao kip - there are 10,000 to a dollar and one is a millionaire and still broke!!! The one I would like them to get away from is using kg/cm2 when in SI units. Big problem in this SI thing - not everyone can agree on their units. psf/ksf/tsf - much better to use, in my opinion.
RE: Negative Skin Friction and SPT value