›› 2013, Vol. 34 ›› Issue (10): 3018-3027.

• Numerical Analysis • Previous Articles     Next Articles

Model testing and numerical simulation study of evolutionary process of thrust load caused landslide

YONG Rui, HU Xin-li, TANG Hui-ming, LI Chang-dong, MA Jun-wei, SONG You-jian   

  1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
  • Received:2013-01-20 Online:2013-10-09 Published:2013-10-18

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Abstract: A physical model has been developed to study the whole evolutionary process of thrust load caused landslide under the multi-stage loading of MTS electro-hydraulic servo loading and analysis system. The displacement and deformation of the thrust load caused landslide model’s top surface are non-consecutively monitored with advanced 3D laser scanning technology. On the basis of multi-fractal theory, the variation of multi-fractal dimension of displacement in the evolutionary process of thrust load caused landslide is studied through the experiment. The experimental results show that the deformation and failure mode of thrust load caused landslide are dominated by general shear failure and it presents explicit developing phased characteristics. When the slope is in margin compressing stage, the deformation on the surface of the landslide is formed as some parts moving forward and uplift on the margin of the landslide, and the multi-fractal dimensions of displacement are decreasing orderly. When the slope is in uniform deformation stage, obvious displacement can be seen on the surface of the landslide model and the deformation keeps spreading to the front and sides of it. Uplift phenomenon can be seen in some parts in the front and center. During this stage, the multi-fractal dimensions of displacement decrease firstly, and then increase. When the slope is in accelerating deformation stage, landslide model surface presents sustained, rapid and obvious deformation associated with horizontal, vertical expansion cracks in the front and center part of it. During this stage, the multi-fractal dimensions of displacement are increasing gradually. Based on the landslide physical model test, FLAC3D numerical software is used to simulate the evolutionary process of thrust load caused landslide. It is verified that evolutionary process of landslide can be divided into the above three stages. Also the simulation discloses that the attenuation of the stability coefficient of landslide is nonlinear and the attenuation rate is decreasing.

Key words: landslide, model test, evolution, multi-fractal dimension, 3D laser scanning

CLC Number: 

  • P 642.22
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