The Feifeng Mountain tourist resort is famous for the ancient caves and drifting activities along the Yongan River. Because of steep slope, lithology (tuff overlying a thick soft layer), tectonic structure, and the underground excavation in ancient times, the area is seriously affected by rockfalls. A quantitative rockfall individual risk assessment has been performed, by using either a 2D and a 3D modelling approach. The 2D approach results in an overestimation of risk along the a priori defined paths, due to the impossibility to consider lateral spread of rockfall trajectories. The 3D approach allows for simulating the lateral dispersion and the trajectories along convergent topography, locally increasing the Individual Risk level.
Wang, X., Zhang, L., Frattini, P., Lari, S., Crosta, G., Agliardi, F. (2015). Analysis of rockfall individual risk at the feifeng underground caves (Zhejiang Province, China) by using 2D and 3D runout models. In G. Lollino, D. Giordan, C. Marunteanu, B. Christaras, I. Yoshinori, C. Margottini (a cura di), Engineering Geology for Society and Territory - Volume 8: Preservation of Cultural Heritage (pp. 357-360). Springer International Publishing [10.1007/978-3-319-09408-3_62].
Analysis of rockfall individual risk at the feifeng underground caves (Zhejiang Province, China) by using 2D and 3D runout models
FRATTINI, PAOLOPrimo
;LARI, SERENASecondo
;CROSTA, GIOVANNIPenultimo
;AGLIARDI, FEDERICOUltimo
2015
Abstract
The Feifeng Mountain tourist resort is famous for the ancient caves and drifting activities along the Yongan River. Because of steep slope, lithology (tuff overlying a thick soft layer), tectonic structure, and the underground excavation in ancient times, the area is seriously affected by rockfalls. A quantitative rockfall individual risk assessment has been performed, by using either a 2D and a 3D modelling approach. The 2D approach results in an overestimation of risk along the a priori defined paths, due to the impossibility to consider lateral spread of rockfall trajectories. The 3D approach allows for simulating the lateral dispersion and the trajectories along convergent topography, locally increasing the Individual Risk level.
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