Geotechnical study in Matallana de Torío

In Matallana de Torío, sandstones, conglomerates and flysch predominate, forming a competent substrate characterised by a good bearing capacity for direct foundations, except in sectors where deltaic silts and peats appear in a strictly localised manner; these must be avoided as a bearing level due to their low strength and high compressibility. The ancillary presence of carbonate rocks, such as limestones and dolomites, is infrequent but relevant for certain types of deep foundation if they are encountered during the geotechnical study.

Local seismic activity is high, although of moderate maximum magnitude (Mmax 3.3), so frequent movements may occur but without major intensities; this situation must be assessed together with the possible existence of karstification phenomena due to the presence, although rare, of carbonate materials. It is essential to verify the existence of cavities before defining the foundation, since karst can represent a severe constraint in certain plots. The non-clayey substrate rules out expansivity risks as the main geotechnical factor.