Estudio geotécnico in Coaña

In Coaña, slates and schists predominate, covering most of the territory, with a very occasional presence of sandstones, conglomerates and flysch. This dominance of metamorphic materials generally conditions a bearing capacity that is suitable for buildings, although it is essential to analyse local fracturing and the possible presence of shallow aquifers. The low permeability of these soils minimises water migration, but their influence on drainage and on the behaviour of shallow foundations must be taken into account.

Seismic activity in Coaña is very low, with only three events in thirty years and a maximum recorded magnitude of 1.7, so it does not represent a relevant constraint for structural design. In addition, the absence of an clayey substratum rules out the risk of expansivity, simplifying the choice of foundation type. The main aspect to control will be the proper assessment of the structure and compaction of the metamorphic substratum, in order to ensure stability and avoid any possible delayed movements.