Estudio geotécnico in Cerdanyola del Vallès

In Cerdanyola del Vallès, fine sands and silts predominate as the geotechnical substrate, followed by slates, schists, and associations of sandstones, conglomerates and flysch. These materials generally exhibit low permeability, although on occasions small aquifers may exist in near-surface layers. The dominant presence of granular soils and compact sedimentary materials favours adequate bearing capacity for foundations, although compaction and the lateral variability of near-surface sediments may require specific characterisation depending on the determined project location.

Seismicity in the area is very low, with scarcely two events recorded over 30 years and a maximum magnitude of 1.7, so no special seismic consideration is required in structural design. Expansivity analyses confirm that the substrate is not clayey, so the risk associated with swelling or volumetric shrinkage is ruled out. As the main constraint, the possible local heterogeneity of the sediments and their response to loads must be considered, without other specific geotechnical risks posing a relevant limiting factor in the municipality.