Estudio geotécnico in Maçanet de la Selva

In Maçanet de la Selva, the subsoil is dominated by granite, gneiss and other igneous rock formations, representing more than 80% of the ground. These strata are characterised by their high bearing capacity and low deformability, favouring shallow direct foundations for most projects. In occasional areas, compact gravels and sands may be found; these materials also provide good conditions for supports and allow variability in the foundation methodology depending on the presence of cohesive or loose levels, although their extent is limited.

Seismic activity in the municipality is moderate, with 34 events over 30 years and a maximum recorded magnitude of 2.9, which corresponds to a low seismic profile, with no specific design requirements due to this factor. There are no risks arising from karstification and, since the substrate is not clayey, the risk of expansivity is ruled out. Thus, the main geotechnical consideration in Maçanet de la Selva lies in the detailed characterisation of the rock and the adaptation of the foundations to its fractured profile and low permeability.