Geotechnical study in Güéjar Sierra

In Güéjar Sierra, slate and schist predominate: low-permeability materials with good bearing capacity, which benefits the stability of shallow foundations in most projects. Limestone, dolomites and marbles occur occasionally, while the presence of gypsum, anhydrite and salts is very limited. The low permeability of the rock matrix mitigates seepage problems, although there may be shallow local aquifers associated with discontinuities.

Seismic activity in the area is moderate, with 28 recorded events over the last 30 years and a low maximum magnitude (Mmax 2.9), so the seismic condition is of medium importance for structural design. Given the existence of karst formations, it is necessary to carry out a specific karst verification before proceeding with the foundations in order to rule out or confirm possible voids or collapses. The absence of an clayey substrate eliminates the risk of expansivity; thus, the main factor will be the appropriate investigation of karst cavities in areas with limestone or dolomites.