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The methodology and the prospection works executed in the study and geo‐ technical zoning of degraded areas of the banks of the Mondego river, between the Manuel Braga Park and the Bridge ‐weir in Coimbra, Portugal are presented. After the definition of the most problematic areas, a geological reconnaissance and four boreholes were done, com‐ 1 Departamento de Ciências da Terra, Centro de Geociências, Largo Marquês de Pombal, Universidade de Coimbra, 3000 -272 Coimbra, Portugal; mqf@dct.uc.pt, 2 Instituto Pedro Nunes, IPNlabgeo, Rua Pedro Nunes, 3030 -199 Coimbra, Portugal; maoliveira@ipn.pt; jp.quintela@gmail.com 412 plemented by other eleven boreholes already available. The banks are mainly constituted of artificial ground, including pavements, tout ‐venant, heterogeneous landfills and limestone blocks cemented with hydraulic mortar, belonging to the retaining walls of the riverbanks. The natural ground is predominantly sandy alluvium with interbedded silty ‐clay mud, changing in depth to gravel, pebbles and sand. Two geotechnical zones were considered in the alluvium: one constituted by sand and mud, and the other constituted by gravel. The alluvium of the lower zone tends to present higher strength, although the values of the SPT tests are quite variable. The deficiencies would be caused by the consolidation of the alluvium mud and by the settlement and low strength of the loose fills.

Caracterização geotécnica de zonas degradadas nas margens do rio Mondego em Coimbra