Estudio geotécnico in Lagartera

In Lagartera, the dominant subsoil is fundamentally made up of sandstones, conglomerates and flysch—materials that occur very frequently and that provide good load-bearing capacity for shallow foundations in most works. There are occasional areas of granite, gneiss, limestones and dolomites, as well as layers of slates and schists; all of these are generally competent soils with low compressibility. The presence of masses of water or surface layers of compact gravel and sand is very limited. In general terms, these strata provide favourable conditions for construction, although it is important to take into account the possible presence of superficial aquifers when designing deep foundations.

As regards seismic hazard, Lagartera records high activity, with 200 events over the last three decades and a maximum magnitude of 5.1. This level of seismicity makes it necessary to incorporate specific criteria for seismic design in any structural project, regardless of the ground’s load-bearing capacity. Additionally, the non-clayey substratum rules out risks associated with expansivity, which simplifies the preliminary geotechnical study. The main limiting factor for the execution of foundations in this municipality is therefore the appropriate consideration of seismicity in the calculation and sizing of the structures.