Dartis SPT is a powerful, user-friendly software for correlating soil properties from SPT blow counts. We have gone through many papers and geotechnical reference books and collected over 200 SPT correlations with various soil properties.
The program automatically applies the following corrections on SPT field data (N) to obtain N60 and N1(60): Borehole Size, Sampling Method, Rod Length, Energy Level, Overburden Stress Corrections (covers 6 methods), Water Level Correction (optional – for bearing capacity analysis when N60≥15)
Dartis SPT shows the equations used for each correlation. Just click on each correlation and the equation will be shown below the list of correlations. Equations have also been included in the report.
Every correlation is developed for certain soil. Dartis SPT knows that. At a specific depth, based on the site stratigraphy Dartis SPT only uses the correlations that are developed for that type of soil. We have categorized the soil types as Coarse and Fine-Grained, Coarse-Grained and Fine-Grained. Each correlation may be valid for one of above.
Overburden correction factor (Cn)
Allowable Bearing Capacity
Relative Density (Dr)
Friction Angle (Phi)
Elastic Modulus (Es)
Shear Wave Velocity (Vs)
Shear Modulus (Gmax)
Undrained Shear Strength (su)
Unconfined Compressive Strength (qu)
Pressuremeter Modulus (Ep)
Elastic Modulus (Vs)
Shear Modulus (Gmax)
