Estudio geotécnico in Sant Llorenç Savall

In Sant Llorenç Savall, areniscas, conglomerates and flysch predominate, with these materials accounting for approximately 87,5% of the territory, while compact gravels and sands occur occasionally. These formations usually show low permeability, although surface aquifers may exist in localised specific areas. Their bearing capacity is generally good for shallow foundations; however, it is recommended that the degree of compaction and the possible presence of loose layers in areas of gravel and sand are analysed before proceeding with the foundation design.

The seismic activity recorded in the municipality is very low, with only one event in 30 years and a maximum magnitude of 1,9, so this factor does not represent a relevant constraint. However, particular attention should be paid to the possibility of karst in the subsurface; this phenomenon must be verified exhaustively before foundation works in order to avoid unexpected differential settlements. Since the substrate is not clayey, the risk of expansivity is ruled out; therefore, the main geotechnical constraint in Sant Llorenç Savall is the identification and precise characterisation of any possible karstic cavities.