Estudio geotécnico in Urkabustaiz

In Urkabustaiz, the predominant geological substrate is composed of limestones, dolomites and marbles, accounting for more than 75% of the surface, accompanied occasionally by sandstones and conglomerates. These materials often provide a high bearing capacity for foundations, although the karstic characteristics of the limestones can generate cavities and sinkholes, conditioning the type and depth of the foundation required. The presence of impermeable formations helps retain surface water in some areas, which is relevant for drainage management in construction projects.

As for the specific geotechnical risks, very low seismicity is observed, with only a single recorded event over 30 years and a low maximum magnitude, which simplifies the seismic criteria in structural design. It is essential to verify the presence and distribution of the karst before any foundation work due to the potential instability arising from underground cavities. Since the substrate is not clayey, the risk of expansivity is ruled out; therefore, the primary condition to be analysed in Urkabustaiz is the karst phenomenon and its possible impact on the safety of the foundations.