Geotechnical study in Cárcer

In Càrcer, soils formed by fine sands and silts predominate, which may affect a restricted bearing capacity and require appropriate characterisation for the design of foundations. The occasional presence of gypsum, anhydrite and salts increases the risk of dissolution processes, especially where water is present, which could compromise the stability of the foundations. Shallow groundwater bodies are also found, which may affect the selection of the support level, while materials such as limestones and gravels appear in minor amounts but could potentially allow better conditions for foundation construction if they are located.

Seismicity in the area is very low, with only four events detected over three decades and a maximum magnitude of 2.9, so it does not constitute a relevant constraint for structural design. The non-clayey substratum rules out the risk of soil expansivity. However, the development of karst phenomena associated with the limestones and the possible dissolution of gypsum require a detailed verification of ground stability before carrying out any foundation, this being the main local geotechnical constraint.