The approach for liquefaction assessment based on Becker Density Test (BDT) is essentially assessing the liquefaction potential using equivalent SPT blow counts (N60). Two following methods are covered in NovoLiq for correlating Becker blows to SPT blows:

 

 

 

Harder & Seed (1986)

 

Alex Sy & Campanella (1993) with considering casing friction (RS)

 

When BDT blow counts are converted to equivalent SPT blow counts (N60), the procedures for Standard Penetration Test will be applied to field test data.

 

Note: it is assumed that user has already corrected BPT blow counts for 'bounce chamber pressure'. Novo Tech program NovoBPT can be used for Becker penetration test processing and correlations.