Estudio geotécnico in Santa Eulàlia de Ronçana

In Santa Eulàlia de Ronçana, hard materials predominate such as sandstones, conglomerates and flysch, accompanied in smaller proportions by granite, gneiss and other igneous rocks. These lithologies generally show a high bearing capacity, which allows direct foundations to be designed in most cases, particularly on sound rock or compacted debris. Although less frequent, alluvial formations of compact gravel and sand provide good conditions for building foundations, whereas fine sands and silts require specific analysis of density and moisture to avoid differential settlement.

Seismicity in the municipality is very low, with just one event in 30 years and a maximum recorded magnitude of 2.4, thereby ruling out significant seismic conditions in structural design. The subsoil presents no risk of expansiveness as it is predominantly non-clayey. Nevertheless, given the presence of possible karstic phenomena, it is essential to verify whether cavities or dissolution processes exist in the ground before carrying out any foundation work, as this factor could decisively affect the safety of the project.