Estudio geotécnico in Ermua

In Ermua, the subsoil is fundamentally composed of limestones, dolomites and marbles, accounting for almost the entirety of the local geological substrate. These rock-like materials provide a high bearing capacity, which favours the stability of shallow and deep foundations. The generally low permeability of these formations limits water infiltration, although small local aquifers may appear near the surface. It is essential to carry out a detailed analysis of fracturing and the condition of the bedrock mass before defining the most suitable foundation solution for any building or infrastructure project.

As regards geodynamics, Ermua shows a notable level of seismicity, with 94 events over 30 years and a maximum recorded magnitude of 3.7, which makes it advisable to take this seismic activity into account during structural design. The non-clayey substrate rules out the presence of risks associated with expansivity, notably simplifying the ground’s volumetric behaviour. The main conditioning factor for the geotechnical study in the area is the quality and layout of the rock masses, together with the local seismic response, which must be assessed specifically for each site.