Estudio geotécnico in Zarautz

In Zarautz, the dominant subsoil comprises limestones, dolomites and marbles, which account for more than 67% of the soils present, followed in smaller measure by sandstones, conglomerates and flysch. These materials generally provide a high bearing capacity, enabling direct shallow foundations except in areas where alteration is localised. However, due to the significant presence of carbonate rocks, it is essential to study fracturing and the possible heterogeneities of the ground, especially in areas where intermittent superficial aquifers may coexist due to the low permeability of the geological profile.

In terms of risk, seismicity in Zarautz is very low, with few recorded events and a low maximum magnitude, which minimises the seismic influence on structural determinations. The non-clayey subsoil also rules out any risk associated with volumetric expansivity. However, the fundamental limiting factor in this municipality is the presence of karstification in the carbonate materials; it is essential to carry out a thorough check for possible cavities or dissolution before defining the foundation solution in order to prevent differential settlement and ensure the stability of the future building.