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ZHANG Yongshuang, BA Renji, REN Sanshao, LI Zongliang. 2020. An analysis of geo-mechanism of the Baige landslide in Jinsha River, Tibet[J]. Geology in China, 47(6): 1637-1645. doi: 10.12029/gc20200603
Citation: ZHANG Yongshuang, BA Renji, REN Sanshao, LI Zongliang. 2020. An analysis of geo-mechanism of the Baige landslide in Jinsha River, Tibet[J]. Geology in China, 47(6): 1637-1645. doi: 10.12029/gc20200603
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An analysis of geo-mechanism of the Baige landslide in Jinsha River, Tibet

  • 1.

    Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, Hebei, China

  • 2.

    Key Laboratory of Quaternary Chronology and Hydro-Environmental Evolution, China Geological Survey, Shijiazhuang, 050061, Hebei, China

  • 3.

    Chengdu Center, China Geological Survey, Chengdu 610081, Sichuan, China

    • Fund Project: Supported jointly by the National Natural Science Foundation of China (No. 41941017, No. 41731287) and China Geological Survey Project (No. 20190505)
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  • Author Bio: ZHANG Yongshuang, male, born in 1968, doctor, professor, engages in research on engineering geology and geo-hazard; E-mail: zhys100@qq.com
Received Date:  01 September 2019
Revised Date:  15 January 2020
Publish Date:  25 December 2020
    Abstract

  • On October 11, 2018, Baige landslide occurred in the upper reaches of the Jinsha River, and this was the most influential landslide event in Tibet since the Yigong landslide in 2000. The formation conditions, stability, monitoring and early warning of the landslide have been studied and reported by many experts, but the geo-mechanism of landslide has seldom been studied. On the basis of regional geological analysis, field survey, mapping and comprehensive research, the authors put forward the failure mechanism of the bank slope of the mélange in the Jinsha River structural suture zone under the sustained gravity, which mainly considers such factors as the structure of slope rock mass controlled by fracture, the weakening of the structural plane by the action of water and weak altered interlayer, and the scale and failure mode of the landslide controlled by unloading. The results have certain guiding significance for early recognition of potential landslide and risk prevention and control along the Jinsha River.

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