Estudio geotécnico in Montferrer i Castellbò

In Montferrer i Castellbò, the predominant geological substrate comprises slates and schists, accounting for 87.5% of the soils, accompanied occasionally by sandstones, conglomerates and flysch. These formations generally exhibit low permeability, meaning that although they may show localised superficial aquifers, drainage conditions are usually limited. The bearing capacity of these metamorphic rocks is favourable for shallow foundation, although it is recommended to verify the quality of the rock mass to ensure stability and avoid differential settlement.

Seismicity in the area is significant, with 91 events recorded in the last three decades and a maximum magnitude of 4.4, so it must be addressed in the structural design phase. Due to the potential presence of karstification, it is essential to carry out specific checks on cavities or dissolution before carrying out any foundation. Since the substrate is not clayey, the risk of expansiveness is ruled out, focusing the main constraint on the possible presence of karst-related phenomena and on the mechanical characteristics of the rock mass.