Geotechnical study in Avinyonet de Puigventós

In Avinyonet de Puigventós, formations of sandstone, conglomerates and flysch predominate, together with carbonate materials such as limestones, dolomites and marbles. These types of ground usually offer good bearing capacity for shallow and deep foundations. Fine sands, silts and compact gravels occur occasionally, providing variability in the support conditions. The main materials generally have low permeability at the surface, although aquifers may exist at greater depth. The foundation approach must be adapted according to the lithology found at the exact point of the project, prioritising the search for firm strata.

The area shows a very low level of seismicity, with only 2 recorded events over 30 years and a low maximum magnitude (Mmax 2), meaning that seismic risk does not represent a relevant constraint for structural design. However, since limestones and dolomites are present, the possible existence of karst processes, such as cavities or dissolution, should be assessed, as these could affect the stability of the foundations; this check is essential before starting any work. On the other hand, the non-clayey substratum eliminates the risk of expansivity, so the main aspect to study is the verification of zones of karstification at depth.