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Volume 41 Issue S2
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WU Zhi-jian, CHEN Yu-jin, WANG Qian, ZHAO Duo-yin, ZHANG Dan. Disaster-causing mechanism of Yongguang landslide under Minxian-Zhangxian Ms6.6 Earthquake[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 165-168. DOI: 10.11779/CJGE2019S2042
Citation: WU Zhi-jian, CHEN Yu-jin, WANG Qian, ZHAO Duo-yin, ZHANG Dan. Disaster-causing mechanism of Yongguang landslide under Minxian-Zhangxian Ms6.6 Earthquake[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 165-168. DOI: 10.11779/CJGE2019S2042
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Disaster-causing mechanism of Yongguang landslide under Minxian-Zhangxian Ms6.6 Earthquake

  • 1. College of Transportation Science & Engineering, Nanjing Tech University, Nanjing 210009, China;
    2. Key Laboratory of Loess Earthquake Engineering, China Earthquake Administration, Lanzhou 73000, China;
    3. Gansu Academy of Sciences, Lanzhou 730070, China;
    4. Lanzhou Jiaotong University, Lanzhou 730070, China

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  • Received Date: April 27, 2019
  • Published Date: July 19, 2019
    Graphical Abstract
    • Abstract
  • The Minxian-Zhangxian MS6.6 earthquake induced a large number of loess landslides and collapses on July 22, 2013. Based on the field borehole survey, soil sampling and surface wave investigation, the topography and distribution of soil layers of the west Yongguang loess landslide are identified. Moreover, the liquefaction probability of the landslide loess is proven through dynamic triaxial liquefaction tests. The dynamic response characteristics and stability influence factors of the landslide under strong earthquake effect are analyzed combining the dynamic finite element method and the strength reduction method. The results show that the water content increases and shear strength decreases at the loess on the slope surface because of heavy rain before the earthquake, and tensile stress and liquefaction occur in the surface of loess slope, which causes the collapse instantaneously and long sliding distance.
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    • References (5)
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    (WANG Lan-min, WU Zhi-jian.Earthuake damage characteristics of the Minxian-Zhangxian Ms6.6 Earthquake and Its lessons[J]. China Earthquake Engineering Journal, 2013, 35(3): 401-412. (in Chinese))
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