Estudio geotécnico in Cobisa

In Cobisa, the ground is mainly dominated by granite, gneiss and other igneous rocks, which provides a competent subsoil with high bearing capacity, suitable for shallow foundations. The secondary formations include sandstones, conglomerates and flysch, followed by schists and slates in smaller proportions; overall, all these lithologies show good mechanical behaviour and low deformability, although they may present locally fractured discontinuities. Formations of hard clays and marls are infrequent, but may require specific attention if encountered within the bearing area, although their consolidation limits possible differential settlement.

With regard to natural hazards, Cobisa is located in an area with high seismicity, with more than 150 events and a maximum recorded magnitude of 5.1, which requires incorporating seismic design criteria in structures. The record of non-clayey substrate rules out the issue of expansivity in the ground, facilitating the design of foundations without risks arising from heave. The absence of karstification eliminates the need for specific measures for underground collapses. As a result, seismicity is the main geotechnical constraint for buildings in the municipality, and must be taken into account in all geotechnical study projects.