Volume 24 Issue 5
Oct.  2018
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YANG Longwei, WEI Yunjie, WANG Wenpei, et al., 2018. RESEARCH ON DYNAMIC CHARACTERISTICS OF THE KALAYAGAQI LANDSLIDE IN YINING COUNTRY, XINJIANG. Journal of Geomechanics, 24 (5): 699-705. DOI: 10.12090/j.issn.1006-6616.2018.24.05.071
Citation: YANG Longwei, WEI Yunjie, WANG Wenpei, et al., 2018. RESEARCH ON DYNAMIC CHARACTERISTICS OF THE KALAYAGAQI LANDSLIDE IN YINING COUNTRY, XINJIANG. Journal of Geomechanics, 24 (5): 699-705. DOI: 10.12090/j.issn.1006-6616.2018.24.05.071

RESEARCH ON DYNAMIC CHARACTERISTICS OF THE KALAYAGAQI LANDSLIDE IN YINING COUNTRY, XINJIANG

doi: 10.12090/j.issn.1006-6616.2018.24.05.071
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  • Received: 2018-05-28
  • Revised: 2018-08-03
  • Published: 2018-10-01
  • Based on the study of dynamic characteristics of high speed long distance loess landslide, a simulation method for spatial prediction of high speed long distance loess landslide is proposed. Taking the Kalayagaqi loess landslide as an example, according to the field geological survey and aerial photograph images of the unmanned aerial vehicle, combined with the engineering geological conditions of the landslide research area, the basic features and formation conditions of the landslide are analysed. The study shows that the main inducing factor of the landslide is the infiltration of melted ice water, and there are mainly four disaster-inducing stages:Firstly, because of the concentration of stress at the top of the mountain, crack phenomenon appears in the trailing of landslide; Secondly, the mountain is covered with snow, and the loess joint fissure are enlarged by the effect of frost heave. Thirdly, due to the rising temperature and the infiltration of melted ice water, the sliding resistance of the landslide is gradually reduced. At last, the landslide lost its stability and slips at a high speed. The Rapid model was used to simulate the whole process of the kalayagaqi landslide. The results show that the duration of the landslide movement is 26 s, the maximum motion speed is up to 22 m/s and the average thickness of the accumulation body reaches 5 m. It proves that the Rapid model can be used to simulate and analyze the dynamic effect of high speed long distance loess landslide, providing reference for the analysis of the disaster-inducing mechanism and dynamic effect of similar landslides in the loess area.

     

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