Geotechnical study in Ribadumia

In Ribadumia, geological formations of sandstones, conglomerates and flysch predominate, representing more than half of the soils in the municipality, followed by fine sands, silts and small proportions of slates and schists. These materials generally offer adequate bearing capacity for conventional buildings, although the low permeability of the substrate may affect the natural drainage of water, making it advisable to carry out a detailed analysis of drainage and vulnerability at groundwater-table level before defining optimum foundation depths and foundation types.

Seismic activity in Ribadumia is very low, with a record of six events over thirty years and a maximum magnitude of 2.2, so the seismic risk may be considered negligible in structural design. With a non-clayey substrate, the risk of expansivity is ruled out as a relevant geotechnical constraint, placing aspects related to impermeability and the adequate drainage of water as the main focus of attention when undertaking a geotechnical study in the area.