Geotechnical study in Coria

In Coria, a substrate of slates and schists predominates, representing close to 78% of the ground, with smaller occurrences of sandstones, conglomerates and flysch. These materials are characterised by low permeability, which limits infiltration and favours stability against differential settlements. For foundations, it is common to use shallow or semi-deep solutions, since the ground usually provides sufficient bearing capacity; however, it is recommended to check the local homogeneity of the layers to avoid surprises on site.

The seismicity in Coria can be considered notable, with 56 records over the last 30 years, but with a maximum magnitude limited to 3.1, which suggests moderate effects on structural design. Since the substrate is not clayey, the risk from expansiveness is ruled out. There is no evidence either of karstification or of the presence of soils with gypsum or silts, so the main factor to be reviewed will be the consistency and compactness of the slates and schists during the geotechnical study phase.