Estudio geotécnico in El Barraco

In El Barraco, the predominant substrate is made up of granite, gneiss and other igneous rocks, accounting for more than 78% of the ground, accompanied by shales and schists in smaller proportions. These lithologies give the ground a high bearing capacity and suitable stability for most shallow and deep foundation systems. However, permeability is generally low, which limits the circulation of groundwater and may affect the design and management of drainage on site, as well as the possibility of localised shallow aquifers.

Seismicity in the municipality is moderate, with 32 events recorded in the last 30 years and a maximum magnitude of 2.8, implying limited seismic impact with no significant effect on the structural design of the foundation. The expansivity analysis indicates a non-clayey substrate, ruling out risks associated with expansive soils. In conclusion, the main factor governing the geotechnical study in El Barraco is the appropriate assessment of the weathered rock, ensuring a detailed characterisation of strength and the state of fracturing in order to select the optimal foundation type.