Estudio geotécnico in Liétor

In Liétor, substrates of limestones, dolomites and marbles predominate, characterised by their high compactness and bearing capacity, which allows for direct foundation support in most cases, especially when the excavation reaches these competent formations. The subordinate levels of fine sands, silts and, to a lesser extent, gravels and compact sands may present a lower local bearing capacity, although they are usually beneath a rock-resistant thickness. The occasional presence of gypsum, anhydrite and salts implies a potential risk of dissolution, to be taken into account especially in areas where the groundwater level may reach these materials.

Seismicity in the area is moderate, with a record of 12 events over 30 years and a low maximum magnitude (Mmax 2.3), which does not impose special requirements on structural design. It is essential to take into account the possible presence of karstification in the carbonate materials, since the existence of cavities can significantly affect the stability of foundations if they are not properly verified before proceeding. The non-clayey substrate rules out issues related to ground expansivity; the main constraint is the characterisation and control of possible karstic cavities beneath the future building.