Estudio geotécnico in Mallén

In Mallén, soils are predominantly composed of fine sands, silts, sandstones, conglomerates and flysch, together with extensive areas of gravel and compacted sands. In general, these materials provide a good bearing capacity, facilitating the execution of shallow foundations for conventional building. Locally, lenses of limestones, dolomites and marbles may occur, as well as small proportions of gypsum, anhydrite and salts, where it is necessary to consider the possible risk of dissolution. The aquifers associated with these sediments show high permeability, which implies the need for appropriate groundwater management in foundation projects.

Seismicity in the municipality is notable, with 68 events recorded over the last 30 years and a maximum magnitude of 4.8, so it is essential to take seismic action into account in structural design. The geological setting indicates the possible presence of karst features, especially associated with the carbonate formations; verifying this by means of a comprehensive geotechnical study is indispensable before defining a safe foundation solution. Since the underlying substrate is not clayey, the risk of expansiveness is ruled out as a conditioning factor. Managing the karst risk and seismic action are the main geotechnical challenges for this setting.