Estudio geotécnico in Olèrdola

In Olèrdola, soils formed by limestones, dolomites and marbles predominate, representing 62.5% of the substrate, while compact gravel and sand are also present in a significant fraction. Carbonate rocks generally offer good bearing capacity, which favours the execution of both shallow and deep foundations. However, the compactness and continuity of these materials need to be verified through a detailed geotechnical study to assess the distribution of voids or fracturing, especially due to the possible presence of disordered zones or underground cavities.

Seismicity in Olèrdola is moderate, with 10 recorded events over the last 30 years and a maximum magnitude of 3, which in principle implies a low-impact seismic scenario for structural design. The substrate is non-clayey in nature, which rules out the risk of expansivity. However, the possible existence of karst associated with the limestones needs to be thoroughly investigated before designing any foundation, as the presence of cavities may compromise ground stability. Verification of the karst phenomenon is the main geotechnical constraint in this municipality.