Estudio geotécnico in San Cibrao das Viñas

In San Cibrao das Viñas, the dominant subsoil is composed of sandstones, conglomerates and flysch at 66.15%, with a significant presence of shales and schists reaching 23.69% of the surface. These materials, essentially detrital and metamorphic in nature, generally provide good bearing capacity for direct foundations, although their low permeability may lead to the localised appearance of small shallow aquifer lenses. In addition, the presence of water mass is recorded only occasionally, which limits the risks associated with saturated soils or soils with low shear strength.

Seismic activity in the area is moderate, with 12 recorded events in the last 30 years and a maximum magnitude of 3.2, which implies a low impact on structural design from the seismic point of view. Since the subsoil is predominantly non-clayey, the risk of expansivity is ruled out, which simplifies the selection of foundation type. Consequently, the main technical constraint will be an accurate assessment of the bearing capacity associated with the detrital and metamorphic materials present in the ground.