Estudio geotécnico in Idiazabal

In Idiazabal, limestones, dolomites and marbles predominate as the substrate, accounting for more than 70% of the soils, which implies a firm base suitable for most foundations, due to its high bearing capacity and low deformability. The levels of sandstones, conglomerates and flysch, although present, do not usually constrain the geotechnical design, except in the case of localised events of finer materials such as sands and silts, which appear very pointedly and generally do not significantly affect the overall stability of the foundation.

Seismic activity in the municipality is moderate, with 11 recorded events over 30 years and a low maximum magnitude (Mmax 2.3), which suggests a limited but not negligible seismic risk in certain projects. No evidence of karst or expansive clayey substrates is presented, ruling these factors out as the main conditioning elements. Therefore, the main geotechnical consideration in Idiazabal is focused on the specific characterisation of the firm rock and the possible identification of levels with lower compactness or permeability within the secondary materials.