Geotechnical study in Orpesa/Oropesa del Mar

In Orpesa/Oropesa del Mar, the subsoil is composed, for the most part, of fine sands and silts, as well as limestones, dolomites and marbles—materials that typically provide a moderate to high bearing capacity. At local level, sectors with hard clays and marls may be found, although their presence is sporadic. The predominance of carbonate materials generally implies good stability for shallow foundations; however, in the deposits of sands and silts, compaction and possible liquefaction deserve additional attention, particularly in large-scale construction projects.

In the area, seismic activity is high, with a recurrence of more than 200 events over 30 years and a maximum magnitude reaching 4.7; therefore, seismic action must be considered without fail in the structural design of buildings. The presence of karst formations in the carbonate bedrock also requires a detailed study before proposing any type of foundation, since cavities or dissolution processes may jeopardise long-term stability. The absence of clayey bedrock rules out expansive risks, but the main constraint lies in verifying the karst and in meeting the seismic requirements.