Estudio geotécnico in Ontur

In the municipality of Ontur, the dominant subsoil is mainly composed of fine sands and silts, which account for approximately 56.63% of the soil, as well as limestones, dolomites and marbles that make up 26.86%. The presence of these soils implies adequate bearing capacity for shallow foundations, although it is advisable to carry out specific studies in cases involving high-load structures, given that limestone and marl formations may show local variations in strength and stability. The permeability of these formations, generally of low permeability, favours stability at depth and the presence of major aquifers, which may influence foundation methods and water management in building or infrastructure works.

The seismicity in Ontur, with 32 events over 30 years and an Mmax of 2.5, is considered very low, but it should nonetheless be taken into account in structural design to ensure safety. In addition, the presence of karst in the area requires prior verification of ground congestion before undertaking deep foundations, as this phenomenon can affect ground stability. Risk of expansiveness is ruled out, since the non-clayey subsoil and the lack of soils with expansive clays predominate. Consequently, the main factor conditioning geotechnical studies in Ontur is the assessment of karst, in order to avoid possible instabilities or delayed sinkholes in future works.