Estudio geotécnico in Amorebieta-Etxano

In Amorebieta-Etxano, soils predominantly consist of limestones, dolomites and marbles, materials with high strength and good bearing capacity, ideal for shallow foundations provided that no major discontinuities are present. Sandstones, conglomerates and flysch occur only occasionally, while fine sands and silts are rare. Overall permeability is low, although there may be localised shallow aquifers that should be identified in any geotechnical study, especially during excavation and foundation stages.

Seismicity in the area is very low, with only 2 recorded events over 30 years and a maximum magnitude of 1.9, so it does not represent a relevant constraint for structural design. The non-clayey substratum rules out any appreciable risk of expansivity. However, the presence of carbonate formations implies the possible development of karst phenomena; therefore, it is essential to check for voids or solution features before carrying out the foundation, this being the main local geotechnical consideration.