Estudio geotécnico in Cartaya

In the municipality of Cartaya, the dominant subsoil is formed by phyllites and schists—materials of metamorphic nature characterised by high compactness and low permeability. Limestones and dolomites show a significant presence, providing localised areas with greater hardness but also heterogeneity. Fine sands and silts, although common, are usually confined to the surface, with a small thickness relative to the competent rock subsoil, whereas compact gravels and sands are less frequent. All of this implies good overall bearing capacity, although it is necessary to confirm the depth of the competent subsoil before designing the most suitable foundation.

Seismic hazard in Cartaya is very low, with only 8 recorded events over the last 30 years and a low maximum magnitude (Mmax 3.4), which makes it possible to consider a favourable scenario with regard to seismic vibrations. There is no evidence of any impact from karstification, and the non-clayey subsoil rules out the risk of ground expansivity. In conclusion, the main factor to consider in local geotechnical studies will be the precise identification of the depth to the impermeable rock stratum, which is key for foundation design.