Geotechnical study in Santa Perpètua de Mogoda

In Santa Perpètua de Mogoda, the geotechnical substrate is made up mainly of fine sands and silts, together with significant inputs of sandstones, conglomerates and flysch. When these materials combine, they provide ground with good bearing capacity and stability for construction, with a very low risk of differential settlement. The high soil permeability, due to the presence of extensive and productive aquifers, promotes drainage and facilitates conventional solutions for shallow foundation design, except in specific areas where there may be local saturation or abrupt drops in the water table.

As regards seismic behaviour, the area shows very low activity, with only 5 events in 30 years and a maximum reported magnitude of 1.6, which minimises the influence of seismicity on structural design. Since the substrate is not clayey, the risk of expansivity in the ground is ruled out, increasing geotechnical reliability. The main factor to consider in Santa Perpètua de Mogoda will be the management of groundwater in excavation projects, as there are no risks associated with karst or with relevant seismic movements.