Influence of the Geometry Alteration of the Landslide Slope on its Stability: A Case Study in the Carnian Alps (Italy)

• Autorzy: Zabuski L. , Bossi G. , Marcato G.

Identyfikatory

DOI

10.1515/heem-2017-0007

• Języki publikacji: EN

Abstrakty

EN

The paper presents the principles of the slope reprofiling and proves the effectiveness of this stabilization measure. The case study of two adjacent landslides in the National Road 52 “Carnica” in the Tagliamento River valley, the Carnian Alps (462304900N, 124205100E) are the example allowing for illustration of this approach. The phenomena have been studied for more than a decade, making it possible to carry out a detailed geological and geomorphological reconstruction. That was done on the basis of a large amount of monitoring data collected during that period. Since the landslides are threatening an important road, countermeasure works to ameliorate the stability conditions of the slides need to be designed. The paper focuses on the creation of a numerical model consistent with monitoring data and capable of reconstructing the dynamics of both landslides. Two cross-sections, one for each landslide, were selected for the analysis. The geometry of the slip surface was determined on the basis of control points, such as slip surface readings from inclinometers, and geomorphological evidence for the contour. The FLAC2D code was used to evaluate the current stability of these landslides and to determine the effectiveness of changing the slope geometry by removing material from the upper part of the slope and putting it to the lowest part as reinforcement.

Słowa kluczowe

EN

geotechnical modelling; landslide risk; monitoring; numerical calculation

• Wydawca: Institute of Hydro-Engineering of Polish Academy of Sciences
• Czasopismo: Archives of Hydro-Engineering and Environmental Mechanics
• Rocznik: 2017
• Tom: Vol. 64, nr 2
• Strony: 101--114
• Opis fizyczny: Bibliogr. 9 poz., rys., tab.

Twórcy

autor

Zabuski L.

• Institute of Hydro-Engineering, Polish Academy of Sciences, Kościerska 7, 80-328 Gdańsk, Poland

autor

Bossi G.

• CNR-IRPI – National Research Council, Institute for Geo-Hydrological Protection, Italy

autor

Marcato G.

• CNR-IRPI – National Research Council, Institute for Geo-Hydrological Protection, Italy

Bibliografia

• Abramson L. W., Lee T. S., Sharma S., Boyce G. M. (2002) Slope Stability and Stabilization Methods, 2nd edition, Wiley & Sons, New York.
• Bromhead E. N. (2005) Geotechnical Structures for Landslide Risk Reduction, [in:] Landslide Hazard and Risk, Glade T., Anderson M. G, Crozier M. J. (eds.), Wiley & Sons, Chichester, 550–593.
• Holtz R. D., Schuster R. L. (1996) Stabilization of Soil Slopes, [in:] Turner A. K., Schuster R. L. Landslides Investigation and Mitigation, National Academy Press, Washington D.C., 437–473.
• Itasca C. G. (2000) FLAC 4.0 User’s Manual, Minneapolis, USA.
• Jaboyedoff M., Michoud C., Derren M. H., Voumard J., Leibundgut G., Sudmeyer-Rieux K., Nadim F., Leroi E. (2016) Human-Induced Landslides: Toward the Analysis of Anthropogenic Changes of the Slope Environment, [in:] Slopes Experience, Theory and Practice, Aversa S., Cascini L., Picarelli L., Scavia C. (eds.), Taylor and Francis Group, Boca Raton, London, New York, Leiden, 217–232.
• Popescu M. E., Sasahara K. (2009) Engineering Measures for Landslide Disaster Mitigation, [in:] Landslide Disaster Risk Reduction, Springer, Berlin, Heidelberg, 608–631.
• Sinigardi G., Bossi G., Scuri A., Marcato G., Borgatti L. (2015) Geological and numerical models as a tool to manage landslide risk: The Passo della Morte case study (UD, Italy), Rendiconti Online della Societ`e Geolica Italiana, 34, 46–53.
• Transportation Research Board (2012) Cost-Effective and Sustainable Road Slope Stabilization and Erosion Control, NCHRP Synthesis 470, Washington D.C.
• Varnes D. J. (1978) Slope Movement Types and Processes, [in:] Special Report 176, Landslides: Analysis and Control, R. L. Schuster, R. J. Krizek (eds.), TRB, National Research Council, Washington D.C., 11–33.