Estudio geotécnico in Urduliz

In Urduliz, a substrate consisting mainly of limestones, dolomites and marbles predominates, to which are added with notable frequency sandstones, conglomerates and flysch. These materials generally exhibit good bearing capacity, which favours direct foundation solutions, especially in areas where hard rocks crop out. Fine sands and silts, which are present occasionally, may require specific analyses to rule out compressibility problems or possible differential settlements, although overall the municipality has suitable ground for most foundation typologies.

The seismic activity recorded in the area is notable, with 94 events recorded in the last 30 years, although the maximum magnitude observed is 3.7, which limits the potential impact on structures. The absence of expansive clay formations rules out the risk associated with volumetric movements of this type of soil. Risks due to karstification are also not identified, given the characteristics of the substrate. As the main factor to be considered in the geotechnical study, the need to adequately characterise the continuity and mechanical properties of the predominant rock substrate stands out in order to optimise the foundations.