Modellizzazione geomeccanica della porzione nord-occidentale dell'unità di frana del Monte Ganda-Ganderberg, denominata "Hahnebaum mure" (Moso in Passiria, Bolzano) = Geomechanical modeling of the north-western portion of the Monte Ganda-Ganderberg landslide called "Hahnebaum mure" (Moso in Passiria, Bolzano)

The main goal of the thesis in the geomechanical modelling of the north-west portion of Monte Ganda landslide, unit also named as “Hahnebaum mure” located in the upper Passeier Valley about 40 km north from Bolzano (Trentino – Alto Adige), between Moos in Passeier (altitude 1007 m) in the South and Rabenstein (altitude 1433 m) in the North. The main landslide unit is a large DSGDS (Deep-Seated Gravitational Slope Deformation) which extends on an area of 3.75 km2 and affects the Western flank of Mount Ganderberg (altitude 2330 m) stretching for 1200 m. The portion studied is a roto-translative landslide of debris that is active since 1951, when it destroyed about 300 m of SS44bis road. Aim of the thesis is the realization of a 3D model of this landslide to perform a 3D geomechanical analysis with the 3D modelling code FLAC3D, with the approach of finite differences. The results are useful to understand the dynamic behaviour of the landslide and the location of major stressed zone, in consequence to find the right location to implement structural or non structural mitigation work to avoid impairment of the road. Finally, a reinforcement intervention is proposed to stabilize the road and a limit equilibrium analysis of the entire slope permits to evaluate the global safety factory increment of the landslide.