Estudio geotécnico in San Sebastián de los Reyes

In San Sebastián de los Reyes, the dominant subsoil is mainly composed of sandstone, conglomerates and flysch, often accompanied by a significant presence of water bodies and, to a lesser extent, shales, schists and isolated levels of compact gravels and sands. These materials usually exhibit a medium to high bearing capacity, suitable for most shallow foundation solutions, although the lateral variability of the strata and the existence of local aquifers require special attention during reconnaissance and construction works to prevent differential settlements and ensure a stable base.

Seismicity is very low, with only 5 recorded events over 30 years and a maximum magnitude below 4, which implies a very low impact on the seismic design regulations for structures. There are no indications of karst processes or relevant expansivity, since the clays present are not expansive or are dispersed in a non-clay matrix; therefore, the risk of expansivity is residual. The main constraint in San Sebastián de los Reyes will be the heterogeneity of the soils and the management of the presence of local aquifers when defining the most appropriate type of foundation.