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Cellular automata model-based numerical analysis for breaching process of embankment dam

Author

Listed:
  • Huaizhi Su

    (Hohai University
    Hohai University)

  • Cheng Qian

    (National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety)

  • Zhiping Wen

    (Nanjing Institute of Technology)

  • Lifu Yang

    (Hohai University)

Abstract

It is of great significance to study the process and cause of embankment dam breach in order to ensure the dam safety. In this paper, the overtopping failure mode of embankment dam is selected as the research object, and the cellular automata (CA) method is introduced to explore the development law and influencing factors of the overtopping failure mode. Based on the physical and mechanical characteristics of embankment dam and the energy evolution law of the dam soil failure process, this paper discusses the realization method of CA for simulations of dam body heterogeneity, soil anisotropy, stress environment, etc., and proposes the determination method of cellular failure threshold, energy dissipation rate and energy transfer coefficient. Afterward, the loading mode of the CA model is determined based on the relationship between generalized energy and force deformation of the dam soil. Then, energy criterion for dam erosion failure and mechanical criterion of breach slope failure are put forward. Finally, the CA model is applied to a practical project so as to analyze the development and cause for scour depth and width of the overtopping failure breach, and the influence of overtopping water level and downstream slope ratio on the development of breach.

Suggested Citation

  • Huaizhi Su & Cheng Qian & Zhiping Wen & Lifu Yang, 2020. "Cellular automata model-based numerical analysis for breaching process of embankment dam," 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. 103(1), pages 251-282, August.
    • Handle: RePEc:spr:nathaz:v:103:y:2020:i:1:d:10.1007_s11069-020-03986-x
    DOI: 10.1007/s11069-020-03986-x
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    References listed on IDEAS

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    1. Huai Su & Jiang Hu & Zhi Wen, 2013. "Optimization of reinforcement strategies for dangerous dams considering time-average system failure probability and benefit–cost ratio using a life quality index," 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. 65(1), pages 799-817, January.
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