Data di Pubblicazione:
2023
Citazione:
Piuro Landslide: 3D Hydromechanical Numerical Modelling of the 1618 Event / A. Morcioni, T. Apuani, F. Cecinato. - In: GEOSCIENCES. - ISSN 2076-3263. - 13:2(2023 Feb), pp. 49.1-49.20. [10.3390/geosciences13020049]
Abstract:
The Piuro 1618 landslide represents a well-known case history of a large Alpine landslide.
It destroyed the ancient village of Piuro (Italian Bregaglia Valley), renowned as an important trading
center between the Mediterranean region and Northern Europe. The event had a significant impact
among communities of all Alpine regions and was well documented by chronicles and paintings
during subsequent decades. However, some aspects, such as the geometry reconstruction of the
landslide body, the location of the landslide scarp, and its dynamics, remained undefined in previous
studies, and a geomechanical characterization of the failure area is completely missing. Using field
and laboratory analysis followed by stress–strain numerical modelling, this work develops a 3D
conceptual geomechanical model of the slope considering its complex geological framework. The
aim is to back-analyze the 1618 event, defining predisposing and triggering factors of the sliding
event, and providing verifications on the geometry and location of the failure scar, as well as on
the landslide dynamics. A coupled hydro-mechanical analysis with a 3D numerical approach is
presented, assuming a rainfall scenario as a possible triggering factor. Simulated displacement and
the development of a deep region of shear strain localization at a depth roughly corresponding to that
of the detected Piuro sliding surface, allow us to highlight the mechanical role of geological elements
outcropping along the slope and to validate the proposed scenario as a likely triggering factor for the
1618 event.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
hydro-mechanical modelling; landslide; effective stress; pore-pressure; FLAC3D
Elenco autori:
A. Morcioni, T. Apuani, F. Cecinato
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