Estudio geotécnico in Tarifa

In Tarifa, sandstone, conglomerate and flysch strata predominate—rocky materials which, together with the secondary presence of limestones, dolomites and marbles, provide a competent foundation for the construction works. The bearing capacity in this area is usually high, which allows for the design of shallow foundations; however, in areas where overconsolidated clays or marls occur, additional checks may be needed due to possible delayed settlements. Low-cohesion ground such as fine sands and silts is very rare and, in general, does not affect the usual support arrangement.

Seismicity in Tarifa is low, with only about 4 events over 30 years and a maximum magnitude of 4.6, meaning that this seismic action must be evaluated in structural design calculations; however, overall risk is moderate. The non-clayey substratum eliminates the danger of volumetric expansiveness. Taken as a whole, the main geotechnical consideration in the municipality is related to local variability in the rock formations; therefore, accurate characterisation of the stratigraphy is essential before defining any foundation project.