Estudio geotécnico in Range

In the municipality of Serra, the predominant geological materials are formed by limestones, dolomites and marbles, together with a significant proportion of sandstones, conglomerates and flysch. These types of rock usually offer good bearing capacity, facilitating the design of shallow foundations in areas with rock outcrop. However, the occasional presence of fine sands and silts implies that there may be locally limited zones with reduced support capacity, which will require specific checks before defining the foundation solution. On the other hand, the existence of gypsum, anhydrite and salts introduces the risk of dissolution processes, which may affect both foundation stability and structural durability; this aspect must be examined thoroughly during the geotechnical study phase.

As regards natural hazards, Serra shows moderate seismicity (27 events in 30 years, Mmax of 3.4), which suggests that the seismic context should be taken into account in the analysis, although the activity is not high. The confirmed presence of karstification requires a detailed verification before carrying out any foundation work to avoid differential settlement or the appearance of unexpected cavities. Since the dominant substrate is not clayey, the risk of expansivity is ruled out. The main geotechnical constraint in Serra focuses on the possible presence of karst cavities and, secondarily, on the dissolution of sulphated materials—key aspects to analyse in order to ensure the safety and feasibility of the works.