SPT correlations are typically derived based on case studies or field tests in a specific soil types. As a result, most of the SPT correlations are only valid for one or two soil types. In Dartis SPT database of correlations, some correlations are applicable for Coarse-Grained soils, some correlations are applicable for Fine-Grained soils and some correlations are applicable for both Fine-Grained and Coarse-Grained soils.

Dartis SPT automatically filters available correlations based on soil grain size (e.g Coarse / Fine / Coarse and Fine).

Coarse and Fine grained soils #

Overburden correction factor (Cn) #

Allowable Bearing Capacity #

Based on shear failure criteria #

Based on allowable settlement #

Coarse grained soils #

Relative Density (Dr) #

Friction Angle (Phi) #

Elastic Modulus (Es) #

Shear Wave Velocity (Vs) #

Shear Modulus (Gmax) #

Fine grained soils #

Undrained Shear Strength (su) #

Unconfined Compressive Strength (qu) #

Pressuremeter Modulus (Ep) #

Elastic Modulus (Vs) #

Shear Modulus (Gmax) #