Geotechnical study in Langreo

In Langreo, non-clayey substrates predominate, with fine sands and silts being the most common materials, although only occasionally. Sandstones, conglomerates and flysch are also present, but in smaller proportions. These formations usually provide adequate bearing capacity for conventional foundations, although the presence of water masses and the low local permeability may affect drainage management and the determination of the optimum foundation type.

Seismic activity in Langreo is very low, with only 10 events reported over 30 years and a low maximum magnitude. However, the possibility of karst processes must be assessed in detail before construction begins, as these may be a significant factor in instability. As it is a non-clayey substrate, there is no risk of expansivity. The most important geotechnical constraint in Langreo is the need to rule out the development of karst cavities that could compromise foundation safety.