Estudio geotécnico in Valadouro, O

In the municipality of O Valadouro, overconsolidated clays and marls of a hard nature predominate, forming more than 70% of the subsoil, together with a significant presence of fine sands and silts. These lithologies provide adequate bearing capacity for shallow foundations, although the low permeability may favour the presence of trapped surface waters. For this reason, geotechnical studies must precisely consider the possibility of shallow aquifers and their drainability before proposing a foundation solution.

Seismicity in the area is high, with 200 events recorded over 30 years and a maximum magnitude of 5, which requires detailed analysis of the seismic action at project level and its incorporation into the structural design. The subsoil, as it is not predominantly clayey, rules out concerns related to expansivity, and the absence of karst processes simplifies the study in this respect. In short, the seismic influence and the low permeability are the main constraints to be assessed in a geotechnical study in O Valadouro.