Geotechnical study in Esparreguera

In Esparreguera, sandstones, conglomerates and flysch predominate, accompanied by compact gravels, limestones and dolomites to a lesser extent. These types of substrate are characterised by good bearing capacity and stiffness, which is favourable for the selection of shallow foundation systems in most cases. However, the presence of hard sedimentary formations alongside layers of fine sands or silts requires an assessment of homogeneity and compaction on a case-by-case basis, in order to control potential differential settlements, particularly in areas where materials alternate.

Seismicity in the municipality is very low, with hardly two events in thirty years and a maximum magnitude of 1.8, which implies a negligible seismic risk for structural design. The absence of clayey substrate avoids the risk of expansivity, simplifying the geotechnical design process. It is important to note that the presence of limestones and dolomites necessitates verifying the existence of karst-related phenomena before defining the foundation; this is the main conditioning factor in Esparreguera for ensuring the stability and safety of the works.