Estudio geotécnico in Montagut and Oix

In Montagut i Oix, the geological substrate is mostly composed of sandstones, conglomerates and flysch, providing solid ground with good bearing capacity, suitable for conventional shallow foundations. Although there are occasional levels of gypsum, anhydrite and salts, as well as limestones, dolomites and marbles, it is relevant to point out the risk of dissolution in areas with gypsum or salts, which may affect the long-term stability of the foundations. The marginal presence of white/soft expansive clays requires verifying their exact location, because although their distribution is limited, they could cause differential settlements if they are found in key areas.

From the seismic perspective, activity in Montagut i Oix can be classified as moderate, with 20 recorded events over the last 30 years and a maximum magnitude (Mmax) of 4,3, suggesting that although the risk is moderate, it still must be assessed during the structural design phase. No significant karstifiable phenomena have been reported, and since the predominant substrate is not clayey, the risk of expansiveness is ruled out as the main conditioning factor. In general, the aspect to monitor with greatest attention in the area is soils with gypsum due to their potential for dissolution, particularly in projects with deep foundations or high loads.