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首页> 外文期刊>Landslides >Progressive failure leading to the 3 December 2013 rockfall at Puigcercs scarp (Catalonia, Spain)
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Progressive failure leading to the 3 December 2013 rockfall at Puigcercs scarp (Catalonia, Spain)

机译：渐进式破坏导致2013年12月3日Puigcercs陡崖（西班牙加泰罗尼亚）发生巨石崩塌

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摘要

A detailed analysis of the pre-failure behavior of the 3 December 2013 rockfall (1,012 m(3)) occurred on Puigcercs 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.
机译：提供了对Puigcercs试点研究区域（西班牙加泰罗尼亚）上发生的2013年12月3日落石（1,012 m（3））的破坏前行为的详细分析。根据每4小时进行一次照相监控获得确切的失效日期。通过地面LiDAR进行的岩石坡度的长期监测（2,217天），可以在最终破坏之前及早发现破坏前的变形和先兆的崩塌。通过对破坏前变形的分析，检测到四个不同的变形区域，并且在其中三个区域中观察到第三蠕变阶段。尝试使用Fukuzono（1985）方法预测失效时间。此外，在渐进破坏过程中，在这四个区域发生的前体落石的时间演变与第三蠕变阶段累积位移的指数模式非常相似。最后，对气象条件的研究没有显示与最终失败有关的任何单一触发因素。相反，在斜坡的几个区域上发生的前次落石的增加以及在变形模式上观察到的加速度增强了稳定条件逐渐退化的作用，最终导致了12月3日的落石事件。

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