Estudio geotécnico in Hernani

In Hernani, slates and schists predominate in the subsoil, which implies the existence of materials with high compaction and low permeability. This type of ground generally provides good bearing capacity for foundations, although its behaviour may vary locally due to discontinuities or foliation zones. To a lesser extent, formations of limestones and dolomites also occur, as well as alternations of sandstones and flysch, which can modify the geotechnical characteristics depending on their degree of moisture and fracturing.

Seismicity in the municipality is moderate, with 10 events recorded over 30 years and a maximum magnitude of 2.6, so the seismic impact on structures is low. However, given that there are sectors with carbonated materials, it is essential to check for the existence of voids or karst development before carrying out any foundation work, as this could affect the stability and safety of the project. The fact that the ground is non-clayey eliminates concerns regarding expansivity. The main conditioning factor in Hernani is therefore the necessary verification of risks associated with karst in limestone areas.