pelelo
Geotechnical
- Aug 10, 2009
- 357
Engineers,
As you may know, some environmental agencies require to advance the sampler instead of the typical 18 inches (3 increments of 6 inches), to do it 24 inches (4 increments of 6 inches).
The typical way to compute the N-value in the 18 inches sampler, is adding up the number of blows of the second and third increments.
I am somewhat confused for the 24-inch case:
In order to compute the N-value, are we supposed to add up the number of blows of 2nd and 3rd increments? or the 3rd and 4th increments?
I checked ASTM D1586 (Standard Test Method for Standard Penetration Test) but no information was provided.
Please let me know your thoughts.
As you may know, some environmental agencies require to advance the sampler instead of the typical 18 inches (3 increments of 6 inches), to do it 24 inches (4 increments of 6 inches).
The typical way to compute the N-value in the 18 inches sampler, is adding up the number of blows of the second and third increments.
I am somewhat confused for the 24-inch case:
In order to compute the N-value, are we supposed to add up the number of blows of 2nd and 3rd increments? or the 3rd and 4th increments?
I checked ASTM D1586 (Standard Test Method for Standard Penetration Test) but no information was provided.
Please let me know your thoughts.