Estudio geotécnico in Alfarràs

In Alfarràs, sandstones, conglomerates and flysch predominate, providing a competent and generally stable substrate for shallow and deep foundations. Secondary deposits of fine sands, silts and gravels, although occasional, require local assessment to check their degree of compaction. It is important to pay attention to the presence of gypsum, anhydrite and salts, as these materials may be subject to dissolution processes that could compromise bearing capacity, especially if they are found close to the surface.

Seismicity in the area is very low, with just 3 events over 30 years and a maximum magnitude of 2.5, so it does not constitute a special requirement in structural design. The Alfarràs substrate does not present an expansivity risk because it is predominantly non-clayey. However, the existence of karst phenomena, associated with the presence of gypsum and salts, must be identified and verified before carrying out any foundation, since karst and the possible voids or dissolutions are the main conditioning factors for the geotechnical study in this municipality.