Geotechnical study in Valdepolo

In Valdepolo, the subsurface is characterised by a significant presence of compact gravels and sands, as well as sandstones, conglomerates and flysch. These materials provide solid bearing capacity, favouring the use of shallow foundations in most situations. Fine sands and silts occur occasionally, which implies a certain local heterogeneity in bearing capacity and requires attention in those specific sites where these lithologies are identified. The ground permeability is high due to the presence of extensive and productive aquifers, an aspect that is fundamental for analysing the possible influence on foundation stability and the hydraulic behaviour of the subsurface.

The municipality has a high level of seismicity, with around 200 events over 30 years and a maximum magnitude of 4.7, which is why the structural design of buildings and foundations must take into account the requirements of the Building Code in relation to seismic actions. The risk from expansivity is low, since expansive clays are only subordinate or occur in non-problematic climatic zones, and there is also no evidence of karstification. The main constraint for the geotechnical study in Valdepolo lies in the high level of seismicity, which must be prioritised during the design and structural calculation phase.