Estudio geotécnico in Castro-Urdiales

In Castro-Urdiales, soils of sandstones, conglomerates and flysch predominate, accompanied by a significant proportion of limestones, dolomites and marbles. These materials generally show good load-bearing capacity, although their compactness and degree of fracturing condition the most suitable type of foundation. The occasional presence of calcareous materials may entail the existence of voids or heterogeneities; therefore, it is essential to carry out a detailed site investigation to define the optimal support system and rule out unstable areas.

Seismic activity in the municipality is moderate, with 17 recorded events in the last 30 years and a maximum magnitude of 2.6, which implies a low seismic risk for new buildings. Given the predominance of carbonate materials, it is vital to verify the presence of karstification before proceeding with any foundation project, as these can significantly affect the stability and behaviour of the subsoil. The non-clayey nature of the substratum rules out expansivity-related problems, leaving the main limiting factor associated with the possible existence of underground voids.