Geotechnical study in Mondariz

In Mondariz, the geological subsoil is composed mainly of sandstones, conglomerates and flysch, which make up more than 90% of the soils in the municipality. These formations often show intermediate to high bearing capacity, suitable for supporting conventional buildings provided that the specific conditions of each plot are verified through a geotechnical study. The occasional presence of fine sands and silts requires localised attention, as these materials may undergo differential settlement, although their representativeness in the municipality is low. Areas of land under bodies of water, although rare, should be avoided as a foundation base.

Seismic activity in Mondariz is notable, with 133 recorded events over the last 30 years, although the maximum magnitude (Mmax 3.6) does not impose additional structural requirements under the current seismic code. There are no risks associated with expansive soils, as the predominant subsoil is not clayey, eliminating this factor of concern for foundations. The main constraint in the area is the proper characterisation of the geotechnical variability of the sedimentary materials, to ensure a foundation solution compatible with the possible local presence of sands or silts and the moderate impermeability of the strata.