Geotechnical study in Frailes

In the municipality of Frailes, the geotechnical subsoil is dominated by limestones, dolomites and marbles, which make up more than 65% of the surface ground. These stony materials are characterised by a high bearing capacity and stability, generally facilitating both shallow and deep foundations. The presence, in smaller proportions, of sandstones, conglomerates and flysch, as well as fine sands and silts, adds some variability to soil mechanics, but without excessively compromising the overall load-bearing capacity, except in isolated cases where looser materials are found close to the foundation level.

Seismic activity in Frailes is very low, with only six events recorded over 30 years with a maximum magnitude below 4, which does not represent a significant constraint for structural design. However, due to the high predominance of carbonate materials, it will be necessary to verify the possible existence of karst-related phenomena, as the presence of voids or underground cavities can negatively affect ground homogeneity and foundation safety. The absence of risk due to expansivity, given the non-argillaceous subsoil, simplifies the requirements for geotechnical design, with control of karst being the main factor of attention in studies prior to construction.