Estudio geotécnico in Galapagar

In Galapagar, the dominant ground is formed by granite, gneiss and other igneous rocks, making up 73.65% of the terrain. These lithologies give the soil a high bearing capacity, allowing the execution of shallow foundations to be carried out in the usual way. The occasional presence of sandstones, conglomerates, flysch, slates and schists may introduce variability in strength, although its overall influence is limited owing to its low representation. The limestones, dolomites and marbles, although present, are of a residual nature and do not significantly condition the foundation systems recommended for the area. The formations show generally low permeability, which limits the presence of deep aquifers and reduces problems associated with the dragging or washing away of fines.

Seismicity in Galapagar is very low, with only one recorded event in the last three decades and a maximum magnitude of 1.8, so seismic action does not constitute a relevant constraint. Similarly, the non-clayey subsoil rules out the risk of expansiveness, eliminating the possibility of differential movements due to swelling or shrinkage of clays. There are also no problems associated with karst, given the low presence of carbonate material. The main technical requirement lies in verifying the homogeneity and strength of the granitic soils, and in correctly assessing their depth in order to define the appropriate foundation level.