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The effect of lateral thrust on the progressive slope failure under excavation and rainfall conditions

Author

Listed:
  • Xiang Yu

    (Dalian University of Technology)

  • Tao Zhao

    (Brunel University London)

  • Bin Gong

    (Brunel University London)

  • Yongjun Zhang

    (Qingdao University of Technology)

  • Chun’an Tang

    (Dalian University of Technology)

  • Yu Luo

    (Chinese Academy of Sciences)

Abstract

Large landslides can involve the multiple failures of regional slopes. To understand the effect of lateral thrust caused by the failure of one slope on its surroundings, the failures of two adjacent highway slopes in Guangdong Province, China, were investigated in detail. The interactive failure processes and landslide morphological characteristics of the two slopes were first analyzed based on the on-site investigation. Then, a plane mechanical model of a large-scale slope was established to evaluate the significant influence of the lateral thrust generated by the west slope acting on the east excavated slope. Furthermore, the extrusion effect of the west slope was modelled under the alternate excavation disturbance and rainfall by transferring the thrust forces onto the interface elements, and the induced failure mechanism and instability mode of the east slope under lateral thrust were reproduced numerically. The results show that the compression-shear failure occurred at the middle and rear slope bodies because of the lateral thrust, which led to the formation of a thrust landslide and the final instability of the east slope.

Suggested Citation

  • Xiang Yu & Tao Zhao & Bin Gong & Yongjun Zhang & Chun’an Tang & Yu Luo, 2024. "The effect of lateral thrust on the progressive slope failure under excavation and rainfall conditions," 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. 120(12), pages 10807-10833, September.
    • Handle: RePEc:spr:nathaz:v:120:y:2024:i:12:d:10.1007_s11069-024-06635-9
    DOI: 10.1007/s11069-024-06635-9
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    References listed on IDEAS

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    1. Y. Tang & Q. Xue & Z. Li & W. Feng, 2015. "Three modes of rainfall infiltration inducing loess landslide," 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. 79(1), pages 137-150, October.
    2. Jianqi Zhuang & Kecheng Jia & Jiewei Zhan & Yi Zhu & Chenglong Zhang & Jiaxu Kong & Chenhui Du & Shibao Wang & Yanbo Cao & Jianbing Peng, 2022. "Scenario simulation of the geohazard dynamic process of large-scale landslides: a case study of the Xiaomojiu landslide along the Jinsha River," 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. 112(2), pages 1337-1357, June.
    Full references (including those not matched with items on IDEAS)

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