Estudio geotécnico in Llanera de Ranes

In Llanera de Ranes, the geotechnical environment is dominated by a significant combination of limestones, dolomites and marbles, accompanied by compact gravels and sands in notable proportions. This type of ground provides a high, load-bearing capacity that is favourable for shallow foundations, although the substantial presence of gypsum, anhydrite and salts introduces the risk of dissolution processes, particularly under conditions with groundwater flow. Fine sands and silts appear only occasionally. It is essential to assess the condition and distribution of the soluble materials before defining the optimal foundation type for each project in the area.

Seismicity in Llanera de Ranes is very low, with only 4 recorded events every 30 years and a maximum magnitude (Mmax) of 2.2, which means that the seismic influence on structural design is minimal. However, since the area shows evidence of karstification, it is essential to verify the presence of cavities and karst processes before any foundation work. The absence of an argillaceous substrate rules out the risk of expansivity. The main geotechnical limiting factor for this municipality is the possible presence of karst linked to zones with soluble materials, which requires a detailed study prior to construction.