Abstract
We investigated the site where a rescuer was killed by debris flow during his activity on the deposit of prior debris flow and clarified the process of two debris flows; the first one is considered due to rapid surface flow coincident/just after the heavy rainfall and the second one is done to shallow slope failure induced by infiltrated and migrated groundwater. We gathered information of seventeen cases in which a secondary landslide occurred in the slope where the first landslide had occurred a few hours to a few days prior. The trigger of the first landslide are rainfall, earthquake and unknown. The mechanisms by which the secondary landslides had not taken place at the time of the first one was discussed and classified into three: loss of strength of material, change in force acting on the slope and time dependent characteristics of material. Geotechnical characteristics and conditions in which these mechanisms are possible to make an already-failed slope to fail again are discussed.
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Araiba, K., Doshida, S. (2017). Mechanisms for Secondary Slope Failure in Slope Having Failed. In: Mikos, M., Tiwari, B., Yin, Y., Sassa, K. (eds) Advancing Culture of Living with Landslides. WLF 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-53498-5_132
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DOI: https://doi.org/10.1007/978-3-319-53498-5_132
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