Estudio geotécnico in Navacerrada

In Navacerrada, substrates predominantly comprise slates, schists and, in smaller proportions, granite and gneiss. These lithologies are common in the area and give the ground notable strength and stability for supporting foundations, although local heterogeneities in strength may be present due to joints or surface weathering. Overall permeability is very low, which means that natural drainage of groundwater is usually limited; therefore, it is important to assess the possible presence of shallow aquifers and to manage surface runoff in the vicinity of the foundations.

Seismic activity in Navacerrada is very low, with only about 5 recorded events over 30 years and a maximum magnitude of 3, which implies a minimal seismic risk for structures. The non-clayey substrate practically removes concern regarding expansive soils and their consequent influence on foundation performance. In the absence of karst phenomena and problematic materials, the main factor conditioning geotechnical design will be the precise determination of bearing capacity and the study of possible surface weathering of the rocks present.