Estudio geotécnico in Bollullos Par del Condado

In Bollullos Par del Condado, the ground is dominated by the presence of limestones, dolomites and marbles, which make up up to 97% of the surface geological materials, according to frequent records. Owing to their stiffness and strength, this type of rock provides generally high bearing capacity, facilitating the execution of shallow or semi-deep foundations. However, the permeability of these formations is usually low, although they may host aquifers at local levels, which can influence the choice of the type and depth of the designed foundations.

The area has very low seismicity, with only four recorded events over thirty years and a low maximum magnitude (Mmax 2.1), so the seismic risk in structural planning is minimal. There are no signs of karstification in the surrounding area and the expansivity conditions identified are localised, linked to the presence of non-expansive clays within a non-clayey matrix, which restricts the risk of expansivity to certain specific horizons. The main geotechnical limiting factor in Bollullos Par del Condado will be the precise identification of these possible dispersed clay zones within the limestone matrix, in order to optimise the safety and economy of the foundations.