SPT correction. Several correlations, make use of the energy corrected SPT blow
count, denoted as N60 where 60 is the percentage of the theoretical free-fall ...
web.mst.edu/~rogersda/umrcourses/ge441/NOTES for STANDARD PENETRATION TEST.pdf
when he sat down with Harry Mohr and developed correlations between ... For
evaluation of liquefaction potential, raw SPT blowcounts must be corrected to (N1
)60 ... Burmister's relationship only considered energy input (weight of hammer ....
where N60 is the SPT N-value corrected for field procedures and apparatus; Em
N60: Value of corrected NSPT for an efficiency of 60% (according to Cestari N60
=NSPT) ... A: variable constant between 55-65 from fine sands to coarse sands.
Apr 12, 2015 ... Understanding the Relationship between SPT Data and CPT Data ... the other,
for example from SPT N60 values to CPT tip resistance values.
Granular Soil – Friction Angle. Use Chart 1 to correlate N160 to the friction (phi)
angle. Chart 1: Correlation of SPT N160 with Friction Angle (after Bowles, 1977).
Jun 3, 2010 ... The relation between Vs and N60 is shown to depend strongly on σv', since Vs
...... evaluated a relation between Vs and (N1)60, and found the ...
than by Burmister's (1948) energy correlation (Figure 8). The LaCroix and Horn ...
where N60 is the SPT N-value corrected for field procedures and apparatus, Em
is ... blow count, (N1)60, provides a consistent reference value for penetration ...
(7), P N60-value: N-value corrected to a reference energy ERr of 60 %. .... is
given of the relationship between N60 and (N1)60 versus the density index ID.
Function N60 calculates corrections for field procedures, and function N160
calculates ... N60 = SPT blow count (N-value) corrected for field procedures, after
This document is a summary of correlations between N60 values and general
stratigraphic .... Typical SPT N60 values range from 0 (Weight of Hammer) to 60
bpf. Typical ... 160. 165. Notes: 1. Natural condition, above the groundwater table.