Estudio geotécnico in Quiroga

In Quiroga, the predominant geotechnical substrate consists of phyllites and schists, which occur in 57.69% of the area, whereas granite, gneiss and other igneous rocks account for close to 30%. Owing to their high compaction and low degree of alteration, these materials provide a high bearing capacity, allowing shallow direct foundations or strip footings in most cases. The overall permeability is low, although localised shallow aquifers may occur in fractures or altered zones, which should be characterised during the field campaign.

Seismic activity in Quiroga is significant, with 64 events over the last 30 years and a maximum magnitude of 4.2, which requires close attention to seismic design requirements in the structural project. Although the substrate is not clayey and the risk of expansivity is ruled out, the potential presence of karst in the surrounding area makes it essential to verify the absence of cavities or unstable zones before constructing the foundation. In summary, the main geotechnical consideration in Quiroga lies in characterising the rock mass structure and in the mandatory karst investigation, without overlooking the seismic constraint.