ABSTRACT
Geomechanical properties measured in site investigation programs are highly variable. The causes for the parameter variability can be broadly divided into two groups (Helton 1997). Objective (aleatory) uncertainty results from inherent spatial variability of soil properties, whereas subjective (epistemic) uncertainty is caused by the lack of knowledge and measurement error. Both sources of uncertainty need to be considered in geotechnical design (Schweiger and Peschl 2005). In this work, we focus on the description of the aleatory uncertainty, which is inherent to the given soil deposit and cannot be reduced by additional experiments or improvement of experimental devices.
