On March 12, 2005 in the Scascoli Gorges (Savena Valley, Northern Apennines, Italy) a rock (siltstones and arenites) slope failure occurred damming the torrent below. The geometry of the collapsed rock mass was characterized by a failure surface progressively changing from over-steepened at the top to concave at the bottom. Terrestrial laser scanner technique (TLS) has been applied to obtain high resolution topography of the rock slope. Mechanism and kinematics of the rock slope failure has been investigated by distinct-element code (UDEC). As distinct elements simulation in rock masses largely depends on joint pattern and orientation, accurate discontinuities orientation, spacing and location of discrete surface features have been directly gathered from data provided by TLS. The paper describes the stability analyses carried on simulating the progressively developing damage of the rock mass by reducing the GSI initial value and using an Hoek & Brown constitutive model.
A complex rock slope failure investigated by means of numerical modelling based on laser scanner technique
GHIROTTI, Monica;
2007
Abstract
On March 12, 2005 in the Scascoli Gorges (Savena Valley, Northern Apennines, Italy) a rock (siltstones and arenites) slope failure occurred damming the torrent below. The geometry of the collapsed rock mass was characterized by a failure surface progressively changing from over-steepened at the top to concave at the bottom. Terrestrial laser scanner technique (TLS) has been applied to obtain high resolution topography of the rock slope. Mechanism and kinematics of the rock slope failure has been investigated by distinct-element code (UDEC). As distinct elements simulation in rock masses largely depends on joint pattern and orientation, accurate discontinuities orientation, spacing and location of discrete surface features have been directly gathered from data provided by TLS. The paper describes the stability analyses carried on simulating the progressively developing damage of the rock mass by reducing the GSI initial value and using an Hoek & Brown constitutive model.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
