Abstract
Landslide movement processes often exhibit complex paths, introducing the uncertainty of landslide movement paths, and challenging landslide hazard prediction and pre-disaster prevention and control. In this study, we employed numerical simulations to investigate the dynamic processes with complex paths of the Pangjiawan landslide using the 3D discrete element method. A scenario simulation was conducted to evaluate the stability of the landslide, incorporating arched anti-slide piles, and the reinforcing effect of arch anti-slide piles on the Pangjiayan landslide under different rise-span ratios and pile spacing was analyzed in depth. The results indicate that the Pangjiawan landslide in mountainous notch topography exhibits a complex movement path with turning and convergence behaviors, and arched anti-slide piles are more effective in stabilizing the landslide than traditional linear anti-slide piles. When the embedded depth of the arched anti-slide piles remains consistent, higher rise-span ratios result in more significant synergistic effects between the piles and the surrounding soil. Moreover, even with increased pile spacing and a reduction in the number of anti-slide piles, the landslide displacement after reinforcement with arched anti-slide piles is lower than traditional linear anti-slide piles. The research provides valuable insights into the dynamics of landslide movements, emphasizing the superior reinforcement capabilities of arched anti-slide piles. This contributes to our understanding of landslide mitigation strategies in challenging topography.
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Data availability
The data used to support the findings of this study are available from the corresponding author upon request.
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Acknowledgements
We appreciate the detailed suggestions and constructive comments from the editor and the anonymous reviewers.
Funding
This work was financially supported by Chongqing Education Commission of China (No. KJQN202004306), the graduate research and innovation foundation of Chongqing, China (Grant No. CYS23117), the Natural Science Foundation of Chongqing (CSTB2022NSCQ-MSX1466), Chongqing Planning and Natural Resources Bureau China (KJ-2023018 and No.DK2021Z05null01C), Chongqing Geological Disaster Prevention and Control Center (No. KJ2021050).
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All authors contributed to the study’s conception and design. Field investigation, data collection, and analysis were performed by HP and XF. Establishment of discrete element model was performed by ZC, RT and WC. The first draft of the manuscript was written by QX and ZC, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Xie, Q., Cao, Z., Tian, R. et al. Complex sliding characteristics of landslides and evaluation of the reinforcement with arched anti-slide piles based on 3D discrete element method: a case study. Nat Hazards (2024). https://doi.org/10.1007/s11069-024-06564-7
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DOI: https://doi.org/10.1007/s11069-024-06564-7