Estudio geotécnico in Arahal

In Arahal, the soils are mainly fine sands and silts, together with a significant proportion of sandstones, conglomerates and flysch, and a notable presence of carbonate formations such as limestones, dolomites and marbles. These characteristics reflect a subsoil with variable bearing capacity, where the strength of sedimentary rocks is usually favourable for shallow foundations, although the frequency of loose materials makes adequate verification necessary in each project. The dominant low permeability can lead to the development of shallow aquifers, so the water–soil interaction must be taken into account particularly in the design of the foundations.

Seismic activity in the municipality is high, with 167 recorded events over the last 30 years, reaching maximum magnitudes of 4.4, which requires paying close attention to structural design calculations in any building project to ensure safety against seismic movements. The karst genesis associated with limestone and dolomite outcrops also calls for a specific study to rule out or identify cavities or sinkholes before choosing a foundation type. On the other hand, as the subsoil is non-clayey, the risk of expansivity is ruled out, focusing the main attention on karst processes and seismicity as the fundamental controlling factors.