L'approccio particellare per la modellazione numerica dell'innesco di instabilità di versante in terreni granulari

This PhD work deal with triggering process and stability analysis of granular soil on slope from a micromechanical point of view. Particularly, it was highlighted the capability of micromechanical modelling in describing these phenomena. The granular approach has been calibrated on the base of some experimental triaxial tests perfomed with two different material. Then granular model has been used in reproducing some loading tests on a physical model of sandy slope with quite satisfactory results. The influence of water on soil skeleton was investigated and two new coupled models have been incorporated regarding saturated flow and partial saturated regime. This two models have been tested with seepage tests on slope and with triggering-evaporation tests. In particular it was highlighted that pendular regime should be very important in forecasting triggering mechanisms.