The degradation of the geotechnical characteristics of many geological formations in peninsular Italy has a decisive influence on the various forms of instability which affect the Apennine highlands and slopes, where so many chronically vulnerable towns and villages are located. Intrinsic deterioration, of tectonic and neotectonic origin, results in such formations being subject to numerous types of mass movement which are triggered by the action of atmospheric agents and seismic events. The explanation for the geological environmental evolution of certain extensive areas of the Apennines must, therefore, be sought not only in attained or acquired geomorphologic configurations, but also in the steady decline in geotechnical behaviour. This eventually leads to a loss of equilibrium and makes many urban areas and their relevant road and rail facilities particularly vulnerable to mass movements.

In this paper, findings concerning the central Adriatic coastal region between the Gargano promontory to the south and the city of Ancona to the north are presented. Starting from the most recent studies concerning the neotectonic and paleo-environmental evolution of these areas, two examples are presented, one relating to carbonate rocks (Tremiti Islands) and the other to mainly argillaceous formations (Ancona). An examination is made of these cases using a linear method, ranging from the structural geological set up of slopes to analysis of their geotechnical instability, and thus to the identification ofthe most appropriate engineering measures for delaying or impeding on-going mass movements.

    The degradation …

AUTORI: Cotecchia V. RIG ANNO: 1998 NUMERO: 3 Numero di pagina: 46



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