Estudio geotécnico in Urda

In Urda, formations of limestone, dolomites and marbles predominate, followed by compact gravels and sands, which provides a subsoil with good bearing capacity for conventional foundations. Soils of slate and schist are present only occasionally, while the occurrence of expansive clays is rare. The generally impermeable formations may contain shallow aquifers in certain areas, so groundwater levels must be taken into account when designing the foundations.

Seismic activity in this municipality is very low, with only 4 recorded events over 30 years and a maximum magnitude of 1.8, so it does not represent a relevant constraint in structural design. However, the presence of carbonate formations makes it necessary to verify the existence of karst features before carrying out any foundation work, since the evolution of cavities may jeopardise stability. The absence of a clayey substrate rules out the risk of expansivity; therefore, the main factor to analyse in Urda is the possible presence of karst in the calcareous ground.