Estudio geotécnico in Tolosa

In Tolosa, the dominant subsoil comprises limestones, dolomites and marbles, with a significant presence in more than two thirds of the municipality. These materials usually provide good bearing capacity for shallow foundations, although the existence of levels of gypsum, anhydrite and salts—though infrequent—implies the need to analyse potential dissolution-related risks. Sandstones and conglomerates contribute complementary strength, while the limited bands of fine sands and silts are less suitable as a load-bearing base and may require specific treatments.

Seismicity in the area is moderate, with 21 events over the last 30 years and a maximum magnitude of 3.3, which implies a low risk in terms of structural design. The absence of clays as a principal component rules out expansivity problems. However, the proven presence of karstic ground requires rigorous verification of cavities or instabilities prior to selecting the most appropriate foundation type, since this factor represents the main geotechnical constraint in the municipality.