Geotechnical study in San Cristóbal de Segovia

In San Cristóbal de Segovia, the subsoil is dominated by the presence of slates and schists, which cover almost the whole of the municipality and are characterised by their low permeability. These materials, generally considered to be impermeable, limit infiltration, although they may store shallow aquifers in those areas where surface alteration allows it. For the determination of bearing capacity, the slates and schists provide a competent medium, which favours shallow strip or direct foundations at relatively moderate depths, always verifying the degree of weathering before founding.

Seismicity in the municipality of San Cristóbal de Segovia is classified as high, with 200 recorded events in the last 30 years and a maximum magnitude (Mmax) of 4.7. This condition requires adopting specific criteria for seismic design in structural projects. There is no risk associated with karst or expansivity, as the subsoil does not contain expansive clays and the predominant materials do not favour these processes. Therefore, seismic consideration is the main geotechnical constraint for construction in the area.