Estudio geotécnico in Aranguren

In Aranguren, the dominant geological substrate is composed mainly of limestones, dolomites and marbles—materials that represent more than 80% of the soils and provide a solid rock base suitable for shallow and deep foundations. The smaller layers of sands, silts and sandstones that occur occasionally require local verification of bearing capacity, although, in general, the presence of these materials does not constitute a critical constraint. The formations are usually low-permeability, with the possibility of small shallow aquifers; this must be taken into account especially in deep excavations.

Seismic activity in Aranguren shows a moderate frequency, with 17 recorded events over 30 years and a maximum magnitude (Mmax) of 2.7, which implies low requirements in terms of seismic actions on structures. The risk of expansivity is considered low, since the clays present are not expansive or are dispersed in a non-clayey matrix, minimising settlement/heave problems in foundations. The main factor to consider is the local quality of the rock mass, although in general the subsoil allows construction with few geotechnical restrictions.