Geotechnical study in Burela

In Burela, the geological substrate is dominated by shales and schists, metamorphic materials with low weathering and significant strength, which represent most of the soils found in this locality. The occasional presence of overconsolidated clays and marls, although rare, may locally influence the bearing capacity, but in general, the strength and stability of the schists and shales allow direct foundation solutions for most projects, always carrying out specific investigation to rule out areas of intense alteration or fracturing.

The recorded seismic activity in Burela corresponds to a very low level, with only 8 events over 30 years and a maximum magnitude of 2, so the seismic risk is practically negligible in the design of the works. Since the substrate is not clayey, the problem of expansivity is ruled out. Thus, the main geotechnical constraint in Burela is linked to the low permeability of the formations, which favours stability but could limit drainage; special attention is therefore recommended for the management of water in the design of foundations.