Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Seismic Stiffness for Pile Design 1
- Thread starter MarkDK
- Start date
-
1
- #2
MarkDK,
if by seismic stiffness you mean shear-wave velocity (Vs), then by far the most popular correlation is Otha & Gotho
(1978):
Vs = 68 * (NSPT)^0,17 * z^0,2 x fA x fG
where:
z= depth in meters
fA= age factor
fG= grain size factor
fG
clay 1.00
sand, fine 1.09
sand, medium 1.07
sand, coarse 1.14
sand, gravelly 1.15
gravel 1.45
fA
Holocene 1.0
Pleistocene 1.3
More correlations are used, but I don't have'em at hand, and don't know if they have a more successful experimental record.
As to Vane-test Cu, there is something but I'm not sure where, I'll be back to you if I'm able to retrieve some info
![[worm]](/data/assets/smilies/worm.gif "[worm] [worm]")
if by seismic stiffness you mean shear-wave velocity (Vs), then by far the most popular correlation is Otha & Gotho
(1978):
Vs = 68 * (NSPT)^0,17 * z^0,2 x fA x fG
where:
z= depth in meters
fA= age factor
fG= grain size factor
fG
clay 1.00
sand, fine 1.09
sand, medium 1.07
sand, coarse 1.14
sand, gravelly 1.15
gravel 1.45
fA
Holocene 1.0
Pleistocene 1.3
More correlations are used, but I don't have'em at hand, and don't know if they have a more successful experimental record.
As to Vane-test Cu, there is something but I'm not sure where, I'll be back to you if I'm able to retrieve some info
- Status
Similar threads
- Question
