Estudio geotécnico in Cillorigo de Liébana

In Cillorigo de Liébana, limestones, dolomites and marbles predominate as substrates, with occasional occurrences of clays, hard marls and some sandstones, conglomerates or flysch. In general, these materials provide a good bearing capacity for shallow or semi-deep foundations; however, owing to the generally low permeability, local aquifers may develop at certain points. The rigid nature of the limestones and marbles provides stability, but the occasional presence of clayey and marly materials makes it advisable to analyse the ground profile on a point-by-point basis to avoid zones with lower strength.

Seismic activity in the municipality is notable, with 145 events in the last 30 years and a maximum magnitude of M4; although seismicity does not reach critical thresholds, this aspect should be taken into account in structural projects. Given the abundance of carbonate formations, the likelihood of karstification developing is high, which is why it is essential to carry out a specific verification of cavities or sinkholes before executing the foundation. The non-clayey substratum rules out risks associated with expansive soils; the main geotechnical conditioning factor is the potential presence of karst cavities.