•(1) Dr Clegg’s
Revised General Correlation of 1986 for a 4.5 kg Clegg Impact
• Soil Tester (to ~700 % CBR), roughly 1/4 of
the CIV plus 1, then squaring:-
• 2
•% CBR = [(0.24 ×
CIV) + 1] “r” = 0.957
•
•The equation above was derived from results obtained
in Australia, New Zealand
and the UK. These tests cover a wide range of soils for both laboratory and in-situ testing, unsoaked,
non-surcharge conditions.
•
•(2) Dublin Light Rail Project Correlation for
2.25 kg Clegg Impact Soil Tester
• for testing in-situ material prior to
construction (to ~50 % CBR):-
•
• [(Gm (3rd Drop Result) – 14.936) / 79.523]
•% CBR = e
“R” Squared =
0.9317
•
•The
equation above was derived by engineers working on the Dublin LRT Project, Civil, Track & Building Works C600,
Contractor: MVMBNI JV in the period
October 2001 to January 2003. “Gm”
represents “gravity units” peak deceleration
upon impact rather than the “tens of gravities units” scale of CIV.