Geotechnical study in Breda

In the municipality of Breda, sandstones, conglomerates and flysch predominate, together with overconsolidated hard clays and marls, which provides a solid subsoil for foundations. These materials usually show high bearing capacity and are suitable for shallow foundations, although the compactness of occasional gravels and sands also yields good results. The predominantly impermeable lithological composition limits infiltration, although localised superficial aquifers may occur.

Seismic activity in Breda is very low, with a single recorded event every 30 years and a low maximum magnitude of 2.7, so seismicity is not a conditioning factor in structural design. The absence of karst and the fact that the subsoil is not clayey rule out risks of expansiveness and dissolution phenomena, making it easier to choose the appropriate type of foundation and simplifying the technical requirements for the geotechnical study.