Comparison of soil properties obtained from CPT and DMT in-situ tests

The piezocone penetration test (CPT) and flat dilatometer test (DMT) are routinely used in geotechnical practice and are both considered adequate for detailing of soil profile and determination of soil properties. In the paper, results of ground characterization and evaluation of soil properties will be compared based on the combined use of CPT and DMT at different locations, each with different ground composition. Evaluation of both tests in terms of soil type, undrained shear strength, constrained modulus and friction angle are presented and results are compared. The main objective is to show that companion sets of CPT and DMT at a given site could be used to better define the geotechnical ground model and to increase confidence in the derived soil properties.