Estudio geotécnico in Vejer de la Frontera

In Vejer de la Frontera, the predominant bedrock is made up of limestones, dolomites and marbles, together with the frequent presence of sandstones and flysch. These formations generally provide soils with good bearing capacity, although the lithological variability and the occasional occurrence of fine sands and silts may require site-specific characterisation to define the foundation type. Coarse gravels and compact sands occur to a lesser extent, locally increasing ground competence for shallow foundations, provided that direct bearing on silty horizons or poorly compacted materials is avoided.

Seismicity in the area is very low, with only around 6 events over the last 30 years and a maximum magnitude below 4, which rules out relevant seismic constraints for structural design. However, since the presence of karst phenomena associated with the limestones and dolomites has been detected, it is essential to verify the possible existence of cavities or dissolution before carrying out any foundation work. In addition, the absence of an argillaceous substrate rules out the risk of expansivity, consolidating the karst analysis as the most decisive geotechnical factor in this municipality.