Complex sliding characteristics of landslides and evaluation of the reinforcement with arched anti-slide piles based on 3D discrete element method: a case study

Qiang Xie, Zhilin Cao (), Renjun Tian, Weichen Sun, Alessio Fumagalli, Haiyou Peng, Xiang Fu and Haoyang Luo
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Qiang Xie: Chongqing University
Zhilin Cao: Chongqing University
Renjun Tian: Chongqing University
Weichen Sun: Chongqing University
Alessio Fumagalli: Politecnico di Milano
Haiyou Peng: Chongqing University
Xiang Fu: Chongqing Jiaotong University
Haoyang Luo: Chongqing University

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2024, vol. 120, issue 9, No 36, 8983-9007

Abstract: 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.

Keywords: Pangjiawan landslide; Mountain-notch topography; Complex moving path; Arched anti-slide piles; Discrete element method (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s11069-024-06564-7

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