Geotechnical study in Peñarroya-Pueblonuevo

In Peñarroya-Pueblonuevo, geotechnical studies find predominantly fine sands and silts, followed by frequent presence of slates and schists, as well as occasional fractions of compact gravels and hard clays/marl. Owing to their granulometric nature and consistency, these materials generally exhibit acceptable bearing capacity, particularly where compact formations such as schists or gravels outcrop. However, the localised presence of muds and peats, although rare, implies areas with very low mechanical competence, and therefore these strata should be avoided as a foundation level in order to ensure stability and prevent differential settlements.

As regards seismicity, Peñarroya-Pueblonuevo shows very low seismic activity, with only 5 events over the last 30 years and a maximum magnitude of 3.9, which does not represent a restrictive requirement in standard structural design. No karstic environments are detected, nor risks associated with expansivity, since the substrate is not clayey, thereby ruling out swelling problems. The main geotechnical constraint in the area will be the precise location and characterisation of any possible muddy pockets or peat bogs, together with control of the groundwater level, particularly in areas where shallow aquifers may influence the foundation.