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Numerical simulation of dynamic catastrophe of slope instability in three Gorges reservoir area based on FEM and SPH method

Author

Listed:
  • Zhengyang Su

    (Nanjing Hydraulic Research Institute)

  • Guizhi Wang

    (Jiangsu Water Conservancy Survey, Design and Research Institute Co. Ltd)

  • Yakun Wang

    (Hohai University)

  • Xiang Luo

    (Nanjing Hydraulic Research Institute)

  • Hao Zhang

    (Nanjing Hydraulic Research Institute)

Abstract

Affected by continuous heavy rainfall, a large number of landslide disasters occur every year in the Three Gorges Reservoir area, which causes serious property loss and casualties. In this study, we take a typical reservoir slope as an example. Firstly, the change of plastic zone of the slope under the action of continuous heavy rainfall before the failure is simulated based on the FEM method, considering the coupling of seepage field and stress field. Then, based on the smooth particle hydrodynamics method, HBP rheological model and Drucker–Prager yield criterion are used to simulate the dynamic catastrophic process of slope sliding after instability, and the time–space distribution of velocity field and accumulation form of the landslide are obtained based on the N-S equation. By analyzing the erosion behavior at the junction of various materials on the slope, the dynamic mechanism of the slope instability and slippage is revealed.

Suggested Citation

  • Zhengyang Su & Guizhi Wang & Yakun Wang & Xiang Luo & Hao Zhang, 2022. "Numerical simulation of dynamic catastrophe of slope instability in three Gorges reservoir area based on FEM and SPH method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 111(1), pages 709-724, March.
    • Handle: RePEc:spr:nathaz:v:111:y:2022:i:1:d:10.1007_s11069-021-05075-z
    DOI: 10.1007/s11069-021-05075-z
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    References listed on IDEAS

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    1. Xinfu Xing & Chenglong Wu & Jinhui Li & Xueyou Li & Limin Zhang & Rongjie He, 2021. "Susceptibility assessment for rainfall-induced landslides using a revised logistic regression method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 106(1), pages 97-117, March.
    2. Yu Huang & Chongqiang Zhu, 2014. "Simulation of flow slides in municipal solid waste dumps using a modified MPS method," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 74(2), pages 491-508, November.
    3. L. Calvo & B. Haddad & M. Pastor & D. Palacios, 2015. "Runout and deposit morphology of Bingham fluid as a function of initial volume: implication for debris flow modelling," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 75(1), pages 489-513, January.
    4. Kai Wang & Shaojie Zhang, 2021. "Rainfall-induced landslides assessment in the Fengjie County, Three-Gorge reservoir area, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 108(1), pages 451-478, August.
    5. Chongqiang Zhu & Yu Huang & Liang-tong Zhan, 2018. "SPH-based simulation of flow process of a landslide at Hongao landfill in China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 93(3), pages 1113-1126, September.
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