Estudio geotécnico in Valdilecha

In Valdilecha, a substrate formed by limestones, dolomites and marbles predominates; these carbonate materials offer a high bearing capacity, favouring shallow foundations, especially in areas where they crop out continuously. Crushed gravels and compact sands, although they appear occasionally, may be suitable to support structures provided their density and uniformity are verified, whereas white or soft clays with a degree of expansivity should be avoided as a support base due to their properties. The high permeability of the aquifers in the area reinforces the need for proper protection against washouts and ground alterations.

The seismicity of Valdilecha, with 91 events over 30 years and a maximum magnitude of 3.1, is notable, although the seismic energy released does not represent a high structural risk. Given the clearly karstic nature associated with the predominant carbonate materials, it is essential to check for any possible underground voids or cavities before designing the foundations. The non-clayey nature of the substrate rules out the risk of widespread expansivity; therefore, the main geotechnical constraint lies in verifying karst cavities that could compromise ground stability under load.