Geotechnical study in Villanueva de Alcardete

In Villanueva de Alcardete, outcrops of limestones, dolomites and marbles predominate, accompanied to a lesser extent by sandstones, conglomerates and flysch. These materials generally guarantee a high bearing capacity, which makes conventional direct foundation solutions feasible in most cases. However, the occasional presence of gypsum-formations or formations containing salts entails a dissolution risk that must be taken into account in the ground assessment. Compacted gravels and sands, although less common, can provide good foundations, whereas slates and schists require a localised analysis due to their possible mechanical anisotropy.

Seismic hazard in Villanueva de Alcardete is very low, with only 6 events in the last three decades and a maximum magnitude of 3.2, so it does not represent a relevant constraint in structural design. However, the presence of karstification in the calcareous substratum stands out as a critical aspect that must be verified by means of a detailed geotechnical study campaign before any foundation is executed, as there may be hidden voids or instabilities. Added to this is the fact that the non-clayey substratum rules out any expansivity risk, making control of the karst the main factor to be addressed during the geotechnical study.