Abstract
Using physical simulation models, rainfall-induced landslides have been simulated under various rainfall intensities. During these simulations, we have monitored the physical and mechanical behaviors of the landslide over the slip surface at different heights of the model slopes, as well as taking the whole slope to identify its deformation and failure processes. The results show that the rainfall duration corresponding to the initiation of the debris landslide and is exponentially related to rainfall intensity. Corresponding to the three intervals of the rainfall intensity, there are three types of slope failure modes: (1) the small-slump failure at the leading edge of the slope; (2) the block-slump failure but sometimes there are large blocks sliding down; and (3) the bulk failure but sometimes there is the block-slump failure. Based on the total rainfall-lasting time and the associated proportion of failed mass volume, the early warning of debris landslide can be classified into five grades, i.e., red, orange to red, orange, yellow to orange and yellow, which correspond to the five slope failure modes, respectively.
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Acknowledgments
This research is financially supported by the National Natural Science Foundation of China (Nos. 41807274, 41630640), the Sichuan Science and Technology Program (No. 2019E0R2230230), the Scientific Foundation of the Chinese Academy of Sciences (No. KFJ-STS-QYZD-172). In addition, we would like to thank the predecessors for the guidance, advice and help. For guidance and advice on the design of experiment we thank Siming He, Guoqiang Ou, Quancai Wang, for advice on the revision of the manuscript we thank Siming He and Wei Liu, and we thank experiment Zhanlu Li for help during implement of the experiments. Also thanks the innominate reviewers for the encouragement, serious comments, and guidance. The final publication is available at Springer via https://doi.org/10.1007/s12583-020-1398-3.
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Li, Q., Huang, D., Pei, S. et al. Using Physical Model Experiments for Hazards Assessment of Rainfall-Induced Debris Landslides. J. Earth Sci. 32, 1113–1128 (2021). https://doi.org/10.1007/s12583-020-1398-3
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DOI: https://doi.org/10.1007/s12583-020-1398-3