Geotechnical study in Valle de Mena

In the municipality of Valle de Mena, limestones, dolomites and marbles predominate as the substrate, representing more than 70% of the materials present, accompanied in smaller proportions by sandstones, conglomerates and flysch. This geological composition generally implies a high bearing capacity for foundations, although the presence of carbonate materials and the relative impermeability of the subsoil suggest the need for precise studies to identify any superficial aquifers and avoid surprises on site.

Seismicity in the area is moderate, with 19 events recorded over the last 30 years and a maximum magnitude of 3.4, indicating that seismic risk is not a determining factor, although it should be considered in preliminary analyses. Given the karstified nature of the ground, it is essential to verify the existence of cavities or underground voids before proceeding with any foundation, as these can compromise the stability of structures. On the other hand, since the substrate is non-clayey, the risk of expansiveness is ruled out, with karst being the main geotechnical controlling factor in this locality.