Geotechnical study in Villalba de los Barros

In Villalba de los Barros, the predominant subsoil corresponds to sandstones, conglomerates and flysch, materials which usually show good suitability for foundations, followed by schists and slates that are common in the area. These soil types, typically characterised by low deformability and low plasticity, provide favourable bearing capacity, enabling the design of conventional shallow foundations most of the time. Nevertheless, there is occasional presence of hard overconsolidated clays and marls, and, in particular, of soft formations such as muds and peats in deltaic environments, which must be avoided as a bearing layer due to their low strength and high compressibility.

Seismic activity in the municipality is very low, with only one recorded event in the last 30 years and a low maximum magnitude, so seismicity does not represent any relevant constraint in structural design. Expansivity-related risk can be ruled out thanks to the predominance of a non-clayey subsoil. There is also no risk of karstification in the area. The main constraint for geotechnical studies in Villalba de los Barros lies in identifying areas where soft materials are present, such as muds or peats, which must be properly located and avoided to guarantee the stability of the foundations.