Estudio geotécnico in Bernuy de Porreros

In Bernuy de Porreros, the dominant geological substrate is formed by limestones, dolomites and marbles, which occupy most of the ground and have characteristics of high bearing capacity, providing stability and strength for shallow and deep foundations. The secondary levels of sandstones, conglomerates and flysch complement this profile, adding variability in density and compactness, while slates, schists and small outcrops of granite contribute only marginally. The low surface permeability tends to ensure good hydric stability, but at depth there may be aquifers that must be identified before constructing the foundations in order to avoid problems caused by dragging or the action of groundwater.

This municipality shows high seismicity, with more than 150 events over 30 years and a maximum magnitude exceeding 4.5, so this factor must be fully analysed in structural design and in the selection of the most suitable foundation type. In turn, the presence of a limestone-dolomitic substrate makes it essential to verify the possible existence of cavities or karst processes before executing any foundation, since karstic phenomena can lead to collapses or localised subsidence. Given the non-clayey nature of the substrate, the risk of expansivity is ruled out, so the main constraint will be the combination of karstic phenomena and seismicity.