Geotechnical study in L'Hospitalet de Llobregat

In L'Hospitalet de Llobregat, the predominant ground consists mainly of fine sands and silts, with a significant presence of gravels and compact sands. These sediments, when found in deltaic and fluvial environments, usually exhibit good bearing capacity in areas where compact gravels predominate, whereas sands and silts may require additional checks to prevent differential settlement. It is important to note that, although clays and peats only appear occasionally, these materials have low strength and high compressibility, so it is recommended not to use them as a support layer in foundations.

Seismic activity in the municipality is very low, as only one event has been recorded in the last thirty years with a maximum magnitude of 1.6, which represents an almost non-existent seismic risk for building projects. The non-clayey substrate rules out the existence of problems associated with expansivity. Consequently, the main geotechnical constraint in this area is associated with the lateral variability of the materials and the accurate identification of any possible zones of clays or peats in the ground—key aspects that must be addressed in any local geotechnical study.