Geotechnical study in Alcover

In Alcover, sandstone, conglomerate and flysch substrates predominate, together with frequent layers of compacted gravels and sands; likewise, sectors with limestones, dolomites and marbles are identified, as well as the occasional presence of gypsum, anhydrite and salts. These materials, generally with low permeability, may offer adequate bearing capacity for shallow foundations, particularly in areas of gravels and compacted sands. However, the presence of gypsum and salts implies a risk of dissolution that can affect soil stability in the medium and long term, which requires caution when selecting the founding level, ruling out layers affected by these soluble materials.

Seismic activity in Alcover is classified as notable, with 72 events over 30 years and a moderate maximum magnitude (Mmax 3.6), so it is advisable to take these parameters into account in the geotechnical calculation phases. In addition, the outcrops of limestones and dolomites make it necessary to check for karst phenomena before proposing any foundation, given the possibility of underground voids or cavities. As it is a non-clayey substrate, the risk of expansivity is negligible; nevertheless, the fundamental condition for geotechnical studies in Alcover lies in verifying karst and associated dissolutions in gypsum.