Geotechnical study in Orio

In Orio, the predominant geological substrate is composed of limestones, dolomites and marbles, representing more than 70% of the territory. These rock lithologies, together with the occasional presence of sandstones, conglomerates, flysch, and to a lesser extent fine sands and silts, favour a high bearing capacity and allow shallow (direct) foundations in most cases. However, in specific areas where loose materials such as sands or silts appear, it will be necessary to verify their consistency and avoid bearing on soils that are not suitable for the transmission of loads.

In terms of seismic hazard, Orio shows a high level, with more than 150 events recorded over 30 years and an Mmax value of 4.5, which makes it necessary to explicitly consider seismic action in any structural project. Since the substrate is not clayey, there is no risk of significant expansivity, and no karstification conditions have been identified that would pose additional threats to the foundation. In short, seismicity is the main geotechnical constraint to be assessed when planning and designing buildings in the municipality.