A preliminary geotechnical investigation is an initial assessment of the subsurface conditions at a construction site. It involves a combination of field investigations, laboratory testing, and review of existing data to obtain information about the soil and rock characteristics, groundwater conditions, and potential geotechnical hazards. The purpose is to gather data for preliminary design of foundations, earthworks, and other geotechnical elements. The findings from this investigation help engineers understand the site's geotechnical properties and provide recommendations for further investigations or design considerations to mitigate potential risks.«Geotechnical characterization and rockfall simulation of a slope: a practical case study from south tyrol (italy) »