ABSTRACT
The determination of soil properties is highly affected by its spatial variability. Furthermore, in many cases, it is impossible to extract undisturbed soil sample for laboratory testing. Regarding coarse grained soils, their mechanical parameters are mostly determined directly in situ as conventional shear and oedometric apparatus do not have the capacity for its measurement. In Slovakia, the dynamic penetration test is one of the most widely used field tests for these purposes. The test is primarily used for testing the resistance of coarse-grained soils, but using proper correlations, it is possible to determine other selected properties, including deformation modulus and angle of shear strength. These parameters can also be tested in the laboratory with a large-scale shear box and oedometric apparatus. In this article, the analysis of the results of deformation modulus and angle of shear strength measured in situ and in laboratory is presented.
