Geotechnical study in Teba

In Teba, materials of a detrital nature predominate, mainly sandstones, conglomerates and flysch, which account for the majority of the available foundation ground. In general, these soils exhibit good bearing capacity and suitable behaviour for most shallow foundations, although local layers of fine sands and silts may occur that require caution due to their lower strength and tendency to compressibility. Limestones, dolomites and marbles are less frequent but can provide an excellent base for deep foundations if their continuity is verified. The occasional presence of water masses and the low permeability of the substrate condition the possible occurrence of shallow aquifers, an aspect that should be assessed during the geotechnical study phase.

Seismic activity in Teba is classified as notable, with 133 events over 30 years, so the seismic action must be carefully evaluated in the structural design calculation even though the maximum recorded magnitude is moderate (Mmax 4.3). The geological setting includes areas with possible development of karstification in the carbonate formations; therefore, it is essential to rule out the presence of voids or dissolutions before carrying out any significant foundation. The non-clayey substrate eliminates the risk of expansivity, with the main constraint being potential karstification together with the need to take into account the dynamic characteristics of the ground in relation to earthquakes.