Estudio geotécnico in Sant Feliu de Pallerols

The municipality of Sant Feliu de Pallerols is characterised mainly by the presence of sandstones, conglomerates and flysch, accompanied to a lesser extent by outcrops of granite, gneiss and some limestone and dolomitic rock. These materials generally provide favourable bearing capacity for shallow foundations, although continuity and composition may vary locally. The low permeability typical of these soils can lead to the intermittent presence of shallow aquifers, so it is essential to study the local hydrogeology in detail before defining the foundation solutions in order to optimise the stability of the structures.

From the risk perspective, the area exhibits very low seismicity, with only two recorded events over thirty years and a low maximum magnitude, removing the need for strict seismic criteria in structural design. However, the presence of calcareous and dolomitic materials implies the possible occurrence of karst phenomena, so it is essential to verify these conditions prior to construction to avoid unwanted differential settlements. At the same time, the non-clayey substrate makes it possible to rule out the problem of expansive soils. Thus, the main constraint in the geotechnical study of Sant Feliu de Pallerols is the specific assessment of karst, together with the characterisation of the stratigraphy, to guarantee safety in the foundation.