Geotechnical study in Argentona

In Argentona, the subsoil is dominated by granite, gneiss and other igneous rocks, present in more than 80% of the ground, which guarantees very favourable conditions in terms of bearing capacity and foundation stability for buildings. Fine sands and silts occur occasionally, but their low proportion reduces the likelihood of finding problematic strata in most plots. The natural impermeability of these materials limits infiltration, although shallow aquifers may develop in localised areas where sands and silts are interbedded.

The seismicity analysis in Argentona shows very low seismic activity, with only 5 events over 30 years and a low maximum magnitude (Mmax 1.6), so the seismic risk is practically negligible for structural design. There are also no risks associated with karst or expansiveness, since the non-clayey subsoil eliminates this problem. In short, the main constraint for the geotechnical study in Argentona is linked to the possible existence of near-surface layers of less competent materials, but overall the geological setting is very stable and favourable for development.