Geotechnical study in Palos de la Frontera

In Palos de la Frontera, carbonate substrates predominate, comprising limestones, dolomites and marbles, accompanied by sandstones, conglomerates and flysch in smaller proportions. These stone materials provide a firm and stable foundation, giving high bearing capacity and suitable conditions for direct foundations in most cases. In localised areas, fine sands and silts may occur, although their presence is not significant. The aquifers in the area stand out for their notable permeability, which promotes drainage and reduces risks associated with the accumulation of water in the subsoil.

Seismicity in the municipality is very low, with only around three minor events over 30 years and a maximum magnitude of 2.1, which rules out the need to consider relevant seismic factors in structural designs. No hazards associated with karstification or expansive soils are observed, since the non-clayey nature of the substrate removes any concern regarding expansivity. The main constraint for the geotechnical study lies in assessing the possible presence of localised loose materials, ensuring a homogeneous level of support for the foundations.