Estudio geotécnico in Aranga

In Aranga, the dominant substrate is formed by slates and schists, accounting for almost 70% of the municipality, which implies the presence of metamorphic soils with good mechanical strength but low permeability. Sandstones, conglomerates and flysch are also found in smaller proportions, providing locally stable bearing conditions and medium to high load-bearing capacity for foundations. The scarce presence of granite and gneiss implies a low incidence of very hard rock. In general, these materials offer good conditions for shallow foundation, although their low permeability may favour surface ponding and requires attention to drainage.

Seismicity in Aranga is classified as very low, with only 7 events in the last 30 years and a maximum recorded magnitude of 2.9, which rules out the need to consider structural seismic loads in most projects. There is no risk of karstification and, since the substrate is not clayey, the presence of expansive soils is excluded. As the main constraint, the low permeability of the substrates must be taken into account to avoid drainage problems in shallow foundations.