Estudio geotécnico in Portbou

In Portbou, the ground is dominated by phyllites and schists, metamorphic materials with very low permeability that may occasionally contain shallow aquifers. These lithologies usually provide adequate bearing capacity for foundations provided they are found at sufficient depth and without any alteration, enabling the design of isolated footings or slabs if the substrate crops out at the surface.

The seismicity in Portbou is very low, with only two recorded events over thirty years and a low maximum magnitude, indicating little impact on design. As it is a non-clayey substrate, the risk of expansiveness is ruled out. The main geotechnical constraint is the need to verify the integrity and homogeneity of the rock substrate to ensure the stability of the foundation.