Estudio geotécnico in Sant Cebrià de Vallalta

In Sant Cebrià de Vallalta, rocky substrates of granite, gneiss and other igneous rocks predominate, accounting for almost the entire geological profile. This type of ground, together with the occasional presence of fine sands and silts, provides a high bearing capacity for shallow foundations, provided that levels of silt and sand are avoided if they are found to be saturated. The physical-mechanical characteristics of granite and gneiss favour a safe foundation, enabling robust structures with controlled settlements, while the generally low permeability limits the circulation of water through the ground.

In terms of geotechnical hazards, local seismicity is very low, with only about 4 recorded events over 30 years and a maximum magnitude of 2.4, so the seismic influence on structural designs can be considered negligible. On the other hand, the absence of clayey substrates eliminates the risk associated with expansivity in the area, facilitating foundation works. In summary, the main condition to analyse is the location of possible shallow aquifers and the local variability of the residual materials over the bedrock massif.