Estudio geotécnico in Piera

In the municipality of Piera, the dominant subsoil is formed by sandstones, conglomerates and flysch, which represent half of the soils present and generally offer a good bearing capacity for conventional foundations. Shales and schists are also common, followed by small proportions of fine sands, silts, gravels and compact sands, suggesting a variety of soil conditions within the municipal term. This soil composition indicates good mechanical behaviour, although the presence of low-permeability strata means it is necessary to pay attention to drainage design and groundwater abstraction in the event of deep aquifers.

The seismicity recorded in Piera is very low, with only two minor events in three decades and a maximum magnitude of 2.2, so it is not considered relevant in foundation design. However, it is essential to verify the presence of karst before carrying out foundation works, given the possible existence of underground cavities associated with this phenomenon. The non-clayey substrate rules out the risk of expansivity; the main geotechnical constraint is the possible impact of karst in the subsoil, which could require specific investigation campaigns and detailed analyses.