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Volume 41 Issue 2
Mar.  2022
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Article Navigation >  Bulletin of Geological Science and Technology  > 2022  >  41(2): 300-308
Yang Dengfang, Hu Xinli, Xu Chu, Wang Qiang, Niu Lifei, Zhang Jiehao. Deformation and evolution characteristics of landslides with multiple sliding zones based on physical model test[J]. Bulletin of Geological Science and Technology, 2022, 41(2): 300-308. doi: 10.19509/j.cnki.dzkq.2021.0069
Citation: Yang Dengfang, Hu Xinli, Xu Chu, Wang Qiang, Niu Lifei, Zhang Jiehao. Deformation and evolution characteristics of landslides with multiple sliding zones based on physical model test[J]. Bulletin of Geological Science and Technology, 2022, 41(2): 300-308. doi: 10.19509/j.cnki.dzkq.2021.0069
shu

Deformation and evolution characteristics of landslides with multiple sliding zones based on physical model test

doi: 10.19509/j.cnki.dzkq.2021.0069
  • Received Date: 25 Mar 2021
    Abstract
  • The deformation and evolution characteristics of landslides has always been a key problem to be solved in the field of landslide disaster prediction and prevention, but there are few studies on the deformation evolution characteristics of multiple sliding zone landslides. A physical model of landslides with three sliding zones has been developed to study the whole deformation evolution process of landslides with multiple sliding zones. To realize multiparameter data analysis of multiple sliding zone landslide evolution processes. The displacement data of the slope surface are obtained by PIV technology, and the deep displacement of the landslide is monitored by a flexible inclinometer. At the same time, the soil pressure box is arranged to obtain the change in the internal soil pressure of the landslide. The experimental results show that the failure of multiple sliding zone landslides can be divided into four stages: the initial deformation stage, uniform deformation stage, accelerated deformation stage and failure stage. The main deformation area of the landslide is different in different stages.The deformation of the lower sliding mass gradually develops to shallow depths under the action of gravity and thrust due to the traction of the upper sliding mass. During the deformation process, the stress of the landslide gradually concentrates to the sliding zone, and the landslide thrust presents a multilevel trapezoidal distribution in the direction of depth. During the accelerated deformation stage, the stress at the sliding zone increases rapidly, multilayer stress concentration zones occur in the landslide body, and the thrust change at the sliding zone position is significantly related to the landslide displacement.

     

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