Abstract The 15 February 2010 Maierato landslide has become the symbol of the hydrogeological instability of the Calabria region (Southern Italy). It occurred after a long period of rain in an area prone to landslides. Some videos filmed during the event documented the high velocity and the flow-like character of this landslide after the slope failure. Several studies focused on the pre-failure and failure stages of the Maierato landslide in order to interpret its failure mechanism and to establish the main factors of triggering. However, none of these studies analysed the post-failure stage of this landslide. In the present study, the Material Point Method (MPM) is used to simulate the run-out process of the Maierato landslide and provide a possible explanation of this process. Different scenarios are considered and for each of them the simulated post-failure configuration of the displaced material is compared to that detected after the event. Numerical results match fairly well the observed ones when a severe reduction in the shear strength of the involved soil is accounted for in the analysis. This strength reduction is attributed herein to the high excess pore water pressures generated by the large distortions of the moving soil mass. Moreover, the back-calculated post-failure strength is consistent with that found in several case histories of slope failures involving liquefied materials.

中文翻译：

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使用物质点法对 Maierato 滑坡进行破坏后分析

摘要 2010 年 2 月 15 日发生的 Maierato 滑坡已成为卡拉布里亚地区（意大利南部）水文地质不稳定的象征。它发生在一个容易发生山体滑坡的地区，经过长时间的降雨。在事件期间拍摄的一些视频记录了该滑坡在斜坡破坏后的高速和类似流动的特征。一些研究集中在 Maierato 滑坡的破坏前和破坏阶段，以解释其破坏机制并确定触发的主要因素。然而，这些研究都没有分析这次滑坡的破坏后阶段。在本研究中，材料点法 (MPM) 用于模拟 Maierato 滑坡的滑坡过程，并提供对该过程的可能解释。考虑了不同的场景，并且对于每个场景，将置换材料的模拟故障后配置与事件后检测到的配置进行比较。当分析中考虑到所涉及土壤的剪切强度严重降低时，数值结果与观察到的结果相当吻合。这种强度降低在这里归因于移动土体的大变形所产生的高超孔隙水压力。此外，反向计算的破坏后强度与涉及液化材料的斜坡破坏的几个案例历史中发现的结果一致。当分析中考虑到所涉及土壤的剪切强度严重降低时，数值结果与观察到的结果相当吻合。这种强度降低在这里归因于移动土体的大变形产生的高超孔隙水压力。此外，反向计算的破坏后强度与涉及液化材料的斜坡破坏的几个案例历史中发现的结果一致。当分析中考虑到所涉及土壤的剪切强度严重降低时，数值结果与观察到的结果相当吻合。这种强度降低在这里归因于移动土体的大变形产生的高超孔隙水压力。此外，反向计算的破坏后强度与涉及液化材料的斜坡破坏的几个案例历史中发现的结果一致。