Estudio geotécnico in Boñar

In Boñar, formations of slates and schists predominate, characterised by their low permeability and relative stability as a support for shallow and deep foundations. Occasionally, beds of sandstones, conglomerates and flysch occur, alternated with levels of limestones and dolomites, as well as small percentages of clays and peats of deltaic origin. It is important to note that beds of clays and peats should not be considered as support layers due to their low consistency and high compressibility, which would compromise the ground’s bearing capacity.

Seismicity in the area is moderate, with 21 events over the last 30 years and a maximum recorded magnitude of 2.7, the impact of which on structural design is limited. The possible presence of karstified formations in the subsurface, given the existence of limestones and dolomites, requires specific geotechnical verification before carrying out the foundations, in order to rule out or identify any cavities or dissolution processes that could affect stability. As regards expansivity, the non-clayey substrate rules out the presence of problems associated with expansive soils. The main focus for the geotechnical study in Boñar should be on identifying karstified zones and excluding clays or peats as the base of support.