Geotechnical study in Binissalem

In the municipality of Binissalem, the presence of fine sands and silts predominates, accompanied by a significant contribution of limestones, dolomites and marbles. This combination of materials implies a medium bearing capacity, so it is essential to characterise properly the compaction and the grain-size distribution before defining a foundation. The limestone formations may allow direct foundation solutions, although it is necessary to pay attention to possible transition zones between granular soils and rock.

Seismic activity in Binissalem lies within a moderate range, with 24 events over 30 years and a recorded maximum magnitude of 3.2, so structural design is not usually strongly conditioned by seismicity. However, in the presence of calcareous substrates it is essential to verify the existence of karst-related phenomena, as these can seriously affect the stability and the feasibility of the foundation. The absence of clayey substrates rules out problems of expansive behaviour; the main constraint is the possible presence of karst cavities beneath the foundation area.