Geotechnical study in Friol

In the municipality of Friol, soils formed by slates and schists predominate, along with a significant presence of granite, gneiss and some igneous rocks. Sandstones, conglomerates and flysch are also found in the region. In general, these lithologies show good stability and adequate bearing capacities for shallow (direct) foundations, although the fractured nature of the metamorphic rocks may require precise characterisation to select the optimal foundation type at each site. As, for the most part, these are compact materials with low permeability, the risk of collapse or differential settlement is considered low, provided that a geotechnical assessment is carried out that takes into account the possible local heterogeneity.

Seismic activity in Friol is very low, with barely 6 recorded events in the last 30 years and a maximum magnitude of 2.6, which provides a structurally safe environment from a seismic standpoint. The predominant substrate is not clayey, so the risk of expansiveness is ruled out for this municipality. The absence of karstic features simplifies the aspects related to ground stability. In short, the main geotechnical constraint in Friol will be the correct identification of rock fracturing and weathering, which could influence bearing capacity locally.