Geotechnical study in Algodonales

In Algodonales, the geological substrate is mainly dominated by sandstones, conglomerates and flysch, which provides soils with good strength and a satisfactory bearing capacity for buildings of varying size. Limestone, dolomite and marble formations appear occasionally, and their presence can cause local changes in the stability and behaviour of foundations, especially in areas close to masses of water. Most sediments have very low permeability, which favours construction by minimising issues linked to infiltration; however, the minor presence of fine sands, silts and expansive clays must be taken into account to avoid differential settlement in those specific points.

From the perspective of seismicity, activity in the municipality is at a notable level, with 60 events recorded in the last three decades and a moderate maximum magnitude (Mmax 3.5), so structural design must take this factor into account. Likewise, the existence of carbonate materials (limestones and dolomites) implies the possibility of karst processes, which is essential to verify before carrying out any foundation works in order to avoid risks of sinkholes or subsidence. The non-clayey substrate rules out the danger of expansivity, focusing the main geotechnical constraint on assessing karst conditions and the stability of the supporting levels.