ROckfall risk MAnagement assessment: the RO.MA. approach

The analysis of risk for vehicles and drivers as a result of rockfall on a road is relevant to design management in geotechnical engineering. This process is very complex due to the large number of parameters involved. In this paper, we discuss risk analysis and management procedures for roads subject to rockfall phenomena. To this aims, we are proposing a quantitative method (the RO.MA. approach). We developed an abacus to define the threshold values of acceptable rockfall risk for a given road. Rockfall risk is calculated using an Event Tree approach and compared with the abacus thresholds to evaluate road safety and the need for additional protective measures to reduce the risk to an acceptable level. The approach was successfully applied at a test site located in Bard, Aosta Valley, north-western Italy.

[1]  Lawrence L. Kupper,et al.  Probability, statistics, and decision for civil engineers , 1970 .

[2]  S. Campus.  Evaluation and Prevention of Natural Risks , 2009 .

[3]  P. Budetta,et al.  Assessment of rockfall risk along roads , 2004 .

[4]  Fausto Guzzetti,et al.  Landslide Vulnerability Criteria: A Case Study from Umbria, Central Italy , 2007, Environmental management.

[5]  Felix Redmill,et al.  Developments in Risk-based Approaches to Safety: Proceedings of the Fourteenth Safety-citical Systems Symposium, Bristol, UK, 7-9 February 2006 , 2006 .

[6]  Ik Lee,et al.  The RTA Guide to Slope Risk Analysis Version 3.1 , 2002 .

[7]  W. Z. Savage,et al.  Guidelines for landslide susceptibility, hazard and risk zoning for land-use planning , 2008 .

[8]  S. Emerson,et al.  AASHTO (American Association of State Highway and Transportation Officials). 2001. A Policy on Geometric Design of Highways and Streets. Fourth Edition. Washington, D.C. , 2007 .

[9]  G. Wieczorek,et al.  Rockfall hazard and risk assessment in the Yosemite Valley, California, USA , 2003 .

[10]  Daniele Peila,et al.  Evaluation of Behaviour of Rockfall Restraining Nets by Full Scale Tests , 1998 .

[11]  Daniele Peila.  BONIFICA DI VERSANTI ROCCIOSI PER LA PROTEZIONE DEL TERRITORIO , 2004 .

[12]  J. K. Vrijling,et al.  Acceptable risk as a basis for design , 1998 .

[13]  Faisal Khan,et al.  Techniques and methodologies for risk analysis in chemical process industries , 1998 .

[14]  Christophe Bonnard,et al.  Landslide risk management in Switzerland , 2005 .

[15]  John A. Hudson,et al.  ROCK ENGINEERING SYSTEMS. THEORY AND PRACTICE , 1992 .

[16]  E. Mark Lee,et al.  Landslide Risk Assessment , 2023 .

[17]  F. L. Peckover,et al.  TREATMENT AND MAINTENANCE OF ROCK SLOPES ON TRANSPORTATION ROUTES , 1977 .

[18]  Frank P. Lees,et al.  Loss Prevention In The Process Industries , 1980 .

[19]  P. Reichenbach,et al.  Rockfall Hazard and Risk Assessment Along a Transportation Corridor in the Nera Valley, Central Italy , 2004, Environmental management.

[20]  Daniele Peila,et al.  Tipologie di intervento per la bonifica di versanti rocciosi , 2004 .

[21]  W. J. Roberds,et al.  A risk-based approach for the design of rock slopes subject to multiple failure modes - illustrated by a case study in Hong Kong , 2005 .

[22]  Agnès Helmstetter,et al.  Statistical analysis of rockfall volume distributions: Implications for rockfall dynamics , 2003 .

[23]  Daniele Peila,et al.  Barriere paramassi a rete. Interventi e dimensionamento , 2006 .

[24]  Giovanni B. Crosta,et al.  Valutazione e gestione del rischio da frana , 2001 .

[25]  D. Varnes.  Landslide hazard zonation: A review of principles and practice , 1984 .

[26]  Chris Dale,et al.  Safety-Critical Systems: Problems, Process and Practice - Proceedings of the Seventeenth Safety-Critical Systems Symposium, Brighton, UK, February 3-5, 2009 , 2009, SSS.

[27]  Fausto Guzzetti,et al.  Landslide fatalities and the evaluation of landslide risk in Italy , 2000 .

[28]  S. Evans,et al.  Magnitude and frequency of rock falls and rock slides along the main transportation corridors of southwestern British Columbia , 1999 .

[29]  Daniele Peila,et al.  Use of the event tree to assess the risk reduction obtained from rockfall protection devices , 2008 .

[30]  W. Z. Savage,et al.  Guidelines for landslide susceptibility, hazard and risk zoning for land-use planning. Commentary , 2008 .

[31]  D. Cruden,et al.  Assessment of the hazard from rock fall on a highway , 1997 .

[32]  G. Wieczorek,et al.  Investigation and hazard assessment of the 2003 and 2007 Staircase Falls rock falls, Yosemite National Park, California, USA , 2008 .

[33]  Daniele Peila,et al.  Ground reinforced embankments for rockfall protection: design and evaluation of full scale tests , 2007 .

[34]  O. Hungr,et al.  Landslide Risk Management , 2005 .

[35]  Giovanni B. Crosta,et al.  A methodology for physically based rockfall hazard assessment , 2003 .

[36]  S. Evans,et al.  The assessment of rockfall hazard at the base of talus slopes , 1993 .

[37]  A. Karakas.  Practical Rock Engineering , 2008 .

[38]  G. Giani.  Rock Slope Stability Analysis , 1992 .

[39]  P. Budetta.  Rockfall-induced impact force causing a debris flow on a volcanoclastic soil slope: a case study in southern Italy , 2010 .

[40]  Daniele Peila,et al.  Analysis of rockfall risk on mountainside roads: evaluation of the effect of protection devices , 2014, Natural Hazards.

[41]  Andreas Paul Zischg,et al.  Temporal variability of damage potential on roads as a conceptual contribution towards a short-term avalanche risk simulation , 2005 .

[42]  L. Lave.  Risk Assessment and Management , 2013, Advances in Risk Analysis.