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Deformation and Failure Mechanism of a Massive Ancient Anti-Dip River-Damming Landslide in the Upper Jinsha River

Author

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  • Yanlin Li

    (College of Civil and Architectural Engineering, Beijing University of Technology, Beijing 100124, China)

  • Aijun Yao

    (College of Civil and Architectural Engineering, Beijing University of Technology, Beijing 100124, China)

  • Yifei Gong

    (College of Civil and Architectural Engineering, Beijing University of Technology, Beijing 100124, China)

Abstract

Landslides are a typical geological hazard that can cause large numbers of casualties and huge economic losses, and the overflow of a weir from a blocked river landslide can have even more disastrous consequences. Of the different types of landslides, about 33% of landslides happen in anti-dip slopes. This paper reports a massive ancient anti-dip river-damming landslide on the Jinsha River: the Zongrongcun landslide. Field investigation and theoretical analysis were used to reveal the potential mechanism of this ancient landslide, and the block discrete element software 3DEC was used to replicate its landslide process. The findings from the present study are as follows: (1) blocks in this landslide were classified into significant slide, significant toppling, and significant slide categories based on D f . (2) The whole landslide was divided into significant sliding and toppling zones by D f = 0.5. (3) The results show that the river-damming landslide was likely to be triggered by river erosion, heavy rainfall, gravity. Under strong valley trenching, the rocks on the slope fractured under gravity and tectonic stress. These factors caused rock blocks tensile fracture failure. Then a penetrating sliding surface formed on the slope, which subsequently caused this river-damming landslide.

Suggested Citation

  • Yanlin Li & Aijun Yao & Yifei Gong, 2022. "Deformation and Failure Mechanism of a Massive Ancient Anti-Dip River-Damming Landslide in the Upper Jinsha River," Sustainability, MDPI, vol. 14(20), pages 1-18, October.
  • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13048-:d:939822
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    References listed on IDEAS

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    1. Sahil Sardana & A. K. Verma & Rahul Verma & T. N. Singh, 2019. "Rock slope stability along road cut of Kulikawn to Saikhamakawn of Aizawl, Mizoram, India," 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. 99(2), pages 753-767, November.
    2. Lifen Xu & Xiangwei Meng & Xuegong Xu, 2014. "Natural hazard chain research in China: A review," 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. 70(2), pages 1631-1659, January.
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    1. Jing Luo & Xiangjun Pei & Ronghao Jiang & Tiantao Li & Hao Sun & Bo Jin & Qian Li, 2023. "The Characteristics and Seepage Stability Analysis of Toppling-Sliding Failure under Rainfall," Sustainability, MDPI, vol. 15(10), pages 1-17, May.

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