Estudio geotécnico in Sierra de Fuentes

In Sierra de Fuentes, slates and schists predominate by a wide margin, representing most of the ground, followed in smaller proportions by granite, gneiss and some isolated bodies of water. These rock materials, characterised by low deformability and good cohesion, usually provide an adequate bearing capacity for shallow and semi-deep foundations. The low permeability of these formations limits the risk of sudden loss of support and favours the overall stability of strip footings or raft slabs, although the absence of altered strata or infill near the surface must be confirmed.

With regard to seismic hazard, the municipality has only 9 events in the last 30 years with a maximum magnitude of 1.7, which classifies seismicity as very low, with no relevant implications for structural design. There is no risk of karstification and no presence of expansive materials, since the ground is not clayey, so expansivity is ruled out as a conditioning factor. The main geotechnical consideration is the orientation and alteration of the slates; therefore, very weathered surfaces or local aquifers should be avoided when planning the foundation.