Estudio geotécnico in Sant Julià del Llor i Bonmatí

In Sant Julià del Llor i Bonmatí, substrata are predominantly composed of sandstones, conglomerates and flysch, accompanied in smaller proportions by slates, schists and, occasionally, limestones, dolomites, gravels and granite. This lithological context is reflected in materials with good load-bearing capacity, especially in areas where compact sandstones and cohesive conglomerates predominate, generally allowing for shallow foundations. However, in sectors where there is an occasional presence of gravels or loose sands, it is advisable to verify the degree of compaction and to avoid bearing on less dense layers to ensure stability and minimise settlements.

Seismic activity in the area is very limited, with low recurrence and very slight maximum magnitudes; as a result, the seismic constraint is of little relevance to structural design. The absence of karst and of clayey materials removes concerns about subsidence or expansivity-related phenomena. Therefore, the key technical factor for the geotechnical study in Sant Julià del Llor i Bonmatí lies mainly in the appropriate characterisation of the dominant substrate and the validation of its local compaction at the specific site.