Geotechnical study in Rábade

In Rábade, substrates of slate and schist predominate, occurring in around 78% of the municipality, which conditions the geotechnical characteristics of the territory. These formations are known for being poorly permeable and to exhibit a medium to good bearing capacity, which often favours solutions involving shallow foundations, except in areas that are altered or fractured. The occasional presence of sandstones, conglomerates and flysch may introduce some heterogeneity, but the fine soils (sands and silts) are scarce and, therefore, have limited geotechnical impact. Water bodies represent areas that must be carefully assessed to avoid stability problems or dampness in the foundations.

Seismic activity in Rábade is high, with a record of 200 events in the last 30 years and a maximum magnitude level (Mmax) of 5, so seismic action must be considered as a priority in any construction project and in the design of both the foundations and the structures. The risk of expansivity is ruled out due to the absence of predominant clayey soils in the substrate. The main geotechnical constraint in this municipality is given by seismicity, which requires specific geotechnical studies and the rigorous application of the current regulations in structural design.