ANALYSES AND DESIGN PROCEDURE OF A NEW PHYSICAL MODEL FOR DEBRIS FLOWS: RESULTS OF NUMERICAL SIMULATIONS BY MEANS OF LABORATORY TESTS — IJEGE
 
 
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ANALYSES AND DESIGN PROCEDURE OF A NEW PHYSICAL MODEL FOR DEBRIS FLOWS: RESULTS OF NUMERICAL SIMULATIONS BY MEANS OF LABORATORY TESTS



Abstract:
Debris flows are landslides that may involve large volumes of material and, due to their rapid propagation, they may be potentially dangerous for human lives and lifelines. The use of passive structures, i.e. geosynthetic reinforced earth structures, able to resist to high impact energies, should ensure a low environmental impact. To develop design methods for passive protective structures, the impact forces due to debris flows on these structures must be known. In order to study the impact forces, experimental results of instrumented large scale physical model (flume test) and numerical analysis can be used. In this paper, the numerical simulations carried out in order to design a large scale physical model are shown. In particular, a parametric analysis was performed in order to compare the flow velocities that can be obtained in the flume test with the debris flow velocities observed during real events. Since the used computational code requires the setting of specific rheological laws, several preliminary experimental tests on a small-size flume have been carried out to find the rheological behaviour of the debris flow material.

Authors:
Nicola Moraci - Mediterranea University of Reggio Calabria - Dep. DICEAM - via Graziella Loc. Feo di Vito - 89060 Reggio Calabria, Italy
Marilene Pisano - Mediterranea University of Reggio Calabria - Dep. DICEAM - via Graziella Loc. Feo di Vito - 89060 Reggio Calabria, Italy
Maria Clorinda Mandaglio - Mediterranea University of Reggio Calabria - Dep. DICEAM - via Graziella Loc. Feo di Vito - 89060 Reggio Calabria, Italy
Domenico Gioffrè - Mediterranea University of Reggio Calabria - Dep. DICEAM - via Graziella Loc. Feo di Vito - 89060 Reggio Calabria, Italy
Manuel Pastor - ETS de Ingenieros de Caminos - Universidad Politécnica de Madrid - Ciudad Universitaria, s/n - 28040 Madrid, Spain
Giovanni Leonardi - Mediterranea University of Reggio Calabria - Dep. DICEAM - via Graziella Loc. Feo di Vito - 89060 Reggio Calabria, Italy
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