Geotechnical study in Tacoronte

In Tacoronte, sandstone, conglomerates and flysch soils predominate, covering more than 80% of the local subsoil. These lithologies generally exhibit good bearing capacity, although their variable composition may require detailed studies to determine the optimum foundation depth. Granitic and gneiss formations, although less frequent, can provide excellent foundation conditions. However, the occasional presence of white/soft expansive clays implies the need for special attention in localised areas, as these materials can affect stability due to their susceptibility to volumetric changes associated with moisture. In addition, permeable structures and aquifers present between formations can influence the groundwater behaviour and the choice of the foundation system.

The recorded seismic activity in Tacoronte is very low, with only 4 events over 30 years and a maximum magnitude of 2.2, so seismicity does not represent a relevant constraint for structural design. The risk from expansive soils lies mainly in the areas with clays, which although not predominant, require specific analyses due to the potential for differential movements. In conclusion, lithological variability and the localised presence of expansive materials constitute the main geotechnical constraints for any project in this municipality.