Item: Active Works in a Starting Zone: Monitoring, Maintenance and Functional Restoration. an Analysis of Real Cases of Intervention
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Title: Active Works in a Starting Zone: Monitoring, Maintenance and Functional Restoration. an Analysis of Real Cases of Intervention
Proceedings: International Snow Science Workshop 2016 Proceedings, Breckenridge, CO, USA
Authors:
- Massimo Raviglione [ RocK and Snow Engineering, Tollegno, Italy ]
- Flavio Papetti [ Papetti - Pianificazione, Sviluppo e Difesa del Territorio, Piazza Brembana, Italy ]
- Michela Barberis [ MountainS WorkinG sas, Tollegno, Italy ]
Date: 2016-10-02
Abstract: Active works in a starting zone are interventions made with more or less complex engineering structures (usually snow nets, snow bridges, rakes, tripod stands, etc.) designed and built to hold back the snow cover in the releasing area by limiting the gravitational phenomena (snowflow) of the snowpack. Their secondary, but not less important function is to create "breakages" (linear in case of a continuous positioning or punctual in case of an interrupted fragmentary positioning) within the potentially unstable slab so as to reduce the destabilizing forces and, as a consequence, to limit the avalanche trigger. In many cases, not only are the works or the single handiwork exposed to the stresses related to their function of snowpack retention in the starting zone, but they are also subject to "external" stresses (ie. actions due to rockfall, debris flows, landslides, etc.) which are not consistent with the function for which those active works were conceived, designed and installed. The proposed study, starting from some case studies related to the maintenance interventions on works of active defence carried out by the undersigned, analyzes what has been faced in terms of issues related to "external" stresses not connected with their main function of snowpack retention in the starting zone and shows the maintenance interventions realized for the functional restoration of the structures.
Object ID: ISSW16_P2.38.pdf
Language of Article: English
Presenter(s):
Keywords: active works, maintenance, rockfall, landslides
Page Number(s): 871-877
Subjects: rockfall active works avalanche starting zones
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