Rapid CPT Correlations and Calculations

Dataforensics RAPID CPT automatically calculates the following parameters upon importing the data into gINT:

  • Normalized Soil Behavior Type based on Friction Ratio– Qt vs Fr
  • Normalized Soil Behavior Type based on Pore Pressure – Qt vs Bq
  • Soil Behavior Type based on Friction Ratio– qt vs Fr
  • Soil Behavior Type based on Pore Pressure – qt vs Bq
  • Probabilistic Soil Classification
  • Fuzzy Soil Classification
  • Material Index (Ic)
  • Density (r)
  • Relative Density (Dr)
  • Void Ratio (e0)
  • Effective Friction Angle (f’)
  • Constrained Modulus (M)
  • Coefficient of Lateral Earth Pressure (K0)
  • Undrained Shear Strength (Su)
  • Overconsolidation Ratio (OCR)
  • Sensitivity
  • Fines Content
  • Equivalent (N)60
  • Equivalent (N1)60

In many cases RAPID CPT calculates multiple correlations for the same parameter.  For example, there are three OCR correlations and six undrained shear strength correlations.

Rapid CPT is also flexible.  The user can specify various parameters which affect the analysis including:

  • The Min and Max Drained Threshold Zones i.e. the soil behavior type zones where the material exhibits drained behavior
  • The Ic drained Threshold Zone
  • The Soil Behavior Type (Qt vs Bq or Qt vs Fr) or Material Index (Ic) used in determining whether the material exhibits drained or undrained behavior
  • Geographic parameters such as Nu, NkT, Nk, Nc
  • Water depth
  • Total density for the entire soil profile or for specific depth ranges or even use the total density estimated by the software
  • Smoothing of the Soil Behavior Type via a moving average function
  • Use qc or qt in correlations
  • k factor in OCR correlation
  • Output Units (MPa, kPa, Bars, ksf, psf, psi, tsf)