Estudio geotécnico in the

In the municipality of Les, the geological substratum is dominated by slates and schists, representing almost 70% of the area, followed by granite, gneiss and other igneous rocks. This composition provides a competent rock base with generally high bearing capacity, facilitating direct rock foundation options for most projects. The occasional presence of fine sands and silts should be subject to specific checks, as these may exhibit lower strength and some compressibility, especially at the contact with superficial aquifers.

The seismicity of Les is very low, with hardly any recorded events over three decades and a very low maximum magnitude, so its impact on foundation projects is insignificant. The non-clayey substratum eliminates the risk of expansivity, making it possible to rule out problems associated with swelling or shrinkage. Thus, the main technical constraint for the geotechnical study in Les lies in correctly identifying the homogeneity and condition of the rock substratum on the site, ensuring a safe and efficient foundation.