Estudio geotécnico in Ejea de los Caballeros

In Ejea de los Caballeros, soils of sandstone, conglomerates and flysch predominate, accompanied by gravels, compact sands, and to a lesser extent calcareous and silty materials. This type of substrate generally provides a good bearing capacity for building, although local variations may occur depending on the degree of cementation and compaction of the materials. Low surface permeability provides partial protection against differential settlements, but it is essential to analyse the occasional presence of silts or less competent strata, which could compromise stability, as well as the existence of deep aquifers during excavation phases. Levels of muds or peats are not relevant in this location, which generally allows for standard shallow foundations.

The area shows a notable level of seismicity, with 68 recorded events in the last 30 years and a maximum magnitude of 4.8, which requires seismic criteria to be incorporated into structural calculations and design. In addition, the possible existence of karst processes linked to the limestones, dolomites or marbles present makes it necessary to verify voids or underground instabilities before carrying out any foundation work. Because the substrate is not clayey, the risk of expansivity in the soils is ruled out, which reduces the associated geotechnical complications. As the main constraint, the need to investigate the risk of karst and to consider seismic action in the design stands out.