How to convert Nspt=50/220mm to Nspt in scale of 100
How to convert Nspt=50/220mm to Nspt in scale of 100
(OP)
I have a data of bore logs (Nspt). But most of data has ended in, e.g. Nspt of 50/220mm or else in scale of 50. How can I convert this data to Nspt value in scale of 100? Because I have to generate Nspt into shear wave velocities in order to analyzing soil amplification (ground motion). Thank you.





RE: How to convert Nspt=50/220mm to Nspt in scale of 100
Because, even u blow 100 times it is not clear it can penetrate upto 440mm like the preceding if u blow 100times then it can be penerated upto over 440mm.......
So in my opinion it is more reasonable that just use 50 as it's maximum or using other downhole test.
RE: How to convert Nspt=50/220mm to Nspt in scale of 100
What if I interpolate linearly to defined Nspt in scale of 100 (blows/300mm). For example:
--> Nspt=50/220mm
--> 50 + 50[(300/300)-(220mm/300mm)]=63 (blows/300mm)
I think this is more resonable than I doubled it. Is it right or not?
Thank you.
RE: How to convert Nspt=50/220mm to Nspt in scale of 100
In advanced search type "chunil" into keywords and then tag button on "Handle".
Then u can find...What i posted b4~
Wish it is helpful~
^_^
RE: How to convert Nspt=50/220mm to Nspt in scale of 100
TQ
RE: How to convert Nspt=50/220mm to Nspt in scale of 100
Then urs a reasonable ..
and if i were then i would solve it in this way...
50:220 = x:300
then X = 68.18 and I will use 68 for the value.
But not sure.....
-_-.....
Good Luck..~ ^_^
RE: How to convert Nspt=50/220mm to Nspt in scale of 100
Thank you and Thanks Chunil.