Estudio geotécnico in Castellgalí

In Castellgalí, the geotechnical subsoil is dominated by formations of sandstone, conglomerates and flysch, accompanied by a considerable presence of white/soft expansive clays and fine sands with silts. These materials generally exhibit low permeability and may, in specific areas, concentrate shallow aquifers. The bearing capacity is variable: sandstones and conglomerates usually provide good conditions for foundation design, whereas soft clays require a detailed assessment of their compressibility and stability before selecting the most suitable type of foundation.

With regard to geodynamic behaviour, the presence of karst in the area makes it essential to carry out a specific prior investigation to rule out cavities or subsurface processes before constructing, as these could compromise structural safety. Local seismicity is very low, with barely two recorded events and maximum magnitude values that are low, which minimises the impact of this factor on design. In addition, since the main substratum is not clayey, the risk of expansiveness is ruled out as a relevant conditioning factor. The main geotechnical challenge for Castellgalí lies in the possible occurrence of karstification and lithological heterogeneity, which must be analysed rigorously in each project.