Estudio geotécnico in Esteribar

In the municipality of Esteribar, sandstones, conglomerates and flysch predominate as soils. These materials offer good mechanical characteristics and usually allow conventional foundations, although their bearing capacity can vary locally depending on compaction and the degree of consolidation. In turn, the occasional presence of slates, schists and carbonated formations such as limestones and dolomites introduces heterogeneity into the ground. It is therefore important to identify lithological variations through a detailed geotechnical study. Fine sands and silts, although in the minority, may show locally more compressible zones that must be assessed during the borehole investigation campaign. General permeability is low, but shallow aquifers can condition the temporary stability of excavations and the choice of the foundation system.

Seismicity in Esteribar is considered high, with 161 significant events over 30 years and a maximum magnitude of 5.2, which requires that the structural design of the project incorporates appropriate earthquake-resistant standards. The existence of karst associated with limestones and dolomites makes it necessary to verify the presence of cavities or dissolution processes before carrying out any foundation work, given the potential risk of subsidence or sinkholes. Since the substratum is non-clayey, the risk of expansivity is ruled out. Among all the factors, the high seismicity and the potential for karstification are the primary constraints to be analysed in any geotechnical study for new developments in Esteribar.