Estudio geotécnico in Ourense

In Ourense, sandstone, conglomerate and flysch formations predominate as the substrate, providing a high-strength base suitable for supporting buildings of various typologies. The occasional presence of overconsolidated clays and marls, and of shales and schists, introduces zones with more variable geomechanics, although in general the bearing capacity is favourable. Sectors with compact gravels and sands allow for shallow foundations, whereas fine silty materials are infrequent. The low permeability characteristic of these soils limits the migration of groundwater, although certain shallow aquifers may develop locally and must be verified during the geotechnical investigation to ensure the stability of the foundations.

Seismicity in Ourense shows high activity, accumulating around 200 events over 30 years and a significant maximum magnitude, reaching Mmax=5, so that seismic actions are a relevant design constraint that must be incorporated into the structural design. In addition, there may be karstification, which makes it necessary to carry out a detailed ground verification before proceeding with any foundation in order to avoid risks of subsidence or localised collapses. The absence of an clayey substrate rules out expansivity risks, so the main technical restriction in the geotechnical study is the correct characterisation of areas with karst development and compliance with the structural requirements for seismic loading.