Estudio geotécnico in Corçà

In the municipality of Corçà, formations of sandstones, conglomerates and flysch predominate, accompanied in smaller proportions by gravels, compacted sands and occasional outcrops of granite and gneiss. These materials, for the most part with low to moderate bearing capacity, provide good conditions for shallow foundations, making it essential to assess the compactness and the state of alteration of the flysch layers and the interbedded clays. The gravels and compacted sands present favour shallow foundation solutions, while the igneous rocks provide adequate support at the points where they crop out.

The seismic activity in Corçà is very low, with only 2 recorded events over 30 years and a low maximum magnitude, which minimises the requirements for specific seismic criteria in structural design. Since the subsoil is not clayey, any risk associated with ground expansiveness is ruled out. The main geotechnical constraint in the area lies in correctly evaluating the compactness and continuity of the granular materials and in detecting altered sectors, since the rest of the risk factors is of little relevance.