Progressive failure leading to the 3 December 2013 rockfall at Puigcercós scarp (Catalonia, Spain)

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• 作者：Manuel J. Royán ; Antonio Abellán ; Joan Manuel Vilaplana
• 关键词：Rockfall ; Monitoring ; Pre ; failure deformation ; Precursory rockfall ; Prediction ; Laser scanner
• 刊名：Landslides
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：12
• 期：3
• 页码：585-595
• 全文大小：5,588 KB
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• 作者单位：Manuel J. Royán (1)
  Antonio Abellán (1) (2)
  Joan Manuel Vilaplana (1)
  
  1. RISKNAT Group, GEOMODELS, Departament de Geodinàmica i Geofísica, Facultat de Geologia, Universitat de Barcelona, C/Martí i Franqués, s/n, 08028, Barcelona, Spain
  2. Risk analysis group, Institut des sciences de la Terre (ISTE), Faculté des Géosciences et de l’Environnement, Université de Lausanne, Géopolis, 1015, Lausanne, Switzerland
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Applied Geosciences
  Geography
  Agriculture
  Civil Engineering
  
• 出版者：Springer Berlin Heidelberg
• ISSN：1612-5118

文摘

A detailed analysis of the pre-failure behavior of the 3 December 2013 rockfall (1,012?m3) occurred on Puigcercós pilot study area (Catalonia, Spain) is presented. The exact date of failure was obtained based on a photographic monitoring performed every 4?h. The long-term monitoring (2,217?days) of the rock slope carried out by a Terrestrial LiDAR allowed the early detection of both pre-failure deformation and precursory rockfalls preceding the final failure. By means of the analysis of the pre-failure deformation, four different deformed areas were detected and the tertiary creep phase was observed in three of them. An attempt to predict the time to failure was performed using the Fukuzono’s (1985) method. Furthermore, the temporal evolution of the precursory rockfalls occurred in those four areas during the progressive failure showed a close resemblance with the exponential pattern of the cumulated displacements at tertiary creep stage. Finally, the study of the meteorological conditions did not show any single triggering factor associated with the final failure. Reversely, the increase in the occurrence of precursory rockfalls on several areas of the slope together with the observed acceleration on the deformation pattern reinforce the role of a progressive degradation of the stability conditions, which ultimately leaded to the 3 December rockfall event.