Estudio geotécnico in Caldes de Malavella

In Caldes de Malavella, formations of sandstone, conglomerates and flysch predominate, accompanied in good proportion by granite, gneiss and other igneous rocks. These materials often provide good values of bearing capacity, suitable for conventional shallow foundations, particularly in residential projects or light infrastructure. Compact gravel and sand, present occasionally in the area, also facilitate shallow foundations, although they require local verification of their degree of consolidation. For their part, shales and schists, which are less frequent, may present planes of weakness, which advises carrying out a specific geotechnical study prior to foundation design.

Seismic activity in the municipality is considered notable, with a total of 81 events over 30 years and a maximum magnitude of 4.1; therefore, although moderate in intensity, regional seismicity will need to be taken into account in structural calculations. There is no risk of karst processes or of expansive soils, since the substratum is not of clayey nature. In addition, the very low permeability of the formations described may be relevant for drainage management and the discharge of surface water. In summary, the main focus lies in the local characterisation of the thickness and quality of the subsoil and in meeting the requirements for moderate earthquakes.