Estudio geotécnico in Guarromán

In Guarromán, the soils are dominated by formations of slates and schists, which account for almost half of the near-surface substrate and provide good mechanical resistance for shallow foundations in most plots. Occasionally, outcrops of sandstones, conglomerates and flysch are also found, as well as fine sands and silts, which may require additional care depending on their compaction characteristics and moisture content. Granite, gneiss and other igneous rock formations, although rare, provide excellent support where they occur, while the presence of limestones is minor and uncommon as a level of support. Permeability is generally low, which reduces filtration problems, but the possible existence of localised shallow aquifers should always be studied, particularly beneath detrital materials.

Seismic activity in Guarromán is considered moderate, with 10 recorded events over 30 years and a maximum magnitude of 3.5, which implies a low seismic risk for the structural design of conventional buildings. The substrate does not feature expansive clays, so the risk of volumetric expansion is ruled out. The absence of karstification exempts the area from issues associated with cavities or subsidence due to dissolution. As the main geotechnical constraint, the need for detailed characterisation of slates and schists at the surface stands out, to confirm their integrity and homogeneity as a safe bearing stratum for foundations.