Estudio geotécnico in Vallromanes

In the municipal area of Vallromanes, the predominant substrate is composed of granite, gneiss and other igneous rocks, representing more than 80% of the soils, while compact gravel and sand appear occasionally. The presence of these hard rock formations results in a high bearing capacity for the direct foundation of structures, although excavation may require specific mechanical means due to their hardness; in specific areas of compact sand and gravel, it is recommended to check the relative density to ensure support stability.

With regard to seismicity, the area shows very low seismic activity, with barely five events in 30 years and a very low maximum magnitude (Mmax 1.6), which makes it possible to rule out seismicity as a relevant design constraint. Given the non-clayey substrate, the risk of expansivity is absent in the area. The ground’s impermeability may favour the presence of shallow aquifers, which can require water control during the works, with the hard nature of the substrate being the main geotechnical constraint for foundation projects in Vallromanes.