Estudio geotécnico in Vilobí d'Onyar

In Vilobí d'Onyar, geotechnical studies find that the predominant substrates are sandstones, conglomerates and flysch, accounting for more than 60% of the ground, together with occasional occurrences of gravels, compact sands and igneous rocks such as granite and gneiss. These substrates generally exhibit good mechanical performance, with adequate bearing capacity for the foundations of standard buildings. However, the overall low permeability may imply the presence of shallow aquifers, which requires special attention to the groundwater table when planning gardens or cellars.

Seismic activity in Vilobí d'Onyar is very low, with only 7 events in the last 30 years and a maximum magnitude of 2.8, so it does not constitute a relevant constraint for structural design. The non-clayey substrate rules out the risk of expansiveness, and the absence of karstic phenomena minimises problems of subsidence or cavities. Thus, the main aspect to consider in geotechnical studies will be the heterogeneity of the materials and the possible presence of aquifers, rather than restrictions linked to natural hazards.