Estudio geotécnico in Val do Dubra

In Val do Dubra, the subsoil is mainly composed of slate and schist, accompanied by granite, gneiss and other igneous rocks, as well as sandstones and conglomerates. These materials give the ground high strength and a low degree of compressibility, which are positive factors for the soil’s bearing capacity. Due to the impervious nature of the subsoil or its very low permeability, particular attention is recommended to surface drainage, although direct foundations are viable in most cases. It is unlikely that problematic levels such as muds or peats will be found for the purposes of structural support.

Seismic activity in this municipality is very low, as only 7 events have been recorded in the last three decades, with a maximum magnitude of M4, which significantly limits the seismic impact on the design of foundations. No risk of karstification is detected, and the non-clayey subsoil removes concern regarding expansive soils. The main constraint in Val do Dubra is associated with the low permeability of the geological formations, which requires a specific study of drainage in the geotechnical analysis prior to construction.