Estudio geotécnico in Polinyà

In Polinyà, the ground is dominated by sandstones, conglomerates and flysch, representing most of the useful stratum for foundations. These materials are characterised by good bearing capacity and low compressibility, which allows the use of shallow foundations in most cases. Fine sands and silts appear occasionally and may require specific assessment if they are found at founding depths, as do compacted gravels and sands, which, by their nature, exhibit high permeability and appropriate geotechnical performance for supporting structural loads. The ground permeability, with the presence of extensive aquifers, may affect the groundwater level and must be considered during the design of excavation and the waterproofing of foundations.

Seismic activity in Polinyà is considered very low, with only 5 recorded events over 30 years and a maximum magnitude of 1.6, so it does not condition the structural design. There are no signs of karstification in the area. Although expansive clays may be found subordinately, their limited presence and/or their location in climatic zones without a notable water deficit minimise the risk of swelling-related pathologies. Therefore, the key factor to evaluate geotechnically in Polinyà will be local variations in grain size more than expansive or seismic factors.