Rock and Soil Mechanics ›› 2021, Vol. 42 ›› Issue (3): 681-690.doi: 10.16285/j.rsm.2020.1177

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Surface tilt deformation of soil landslides based on laboratory and field tests

XIE Ji-ren1, 2, QIAO Shi-fan1, YU Peng-kun1, UCHIMURA Taro3, WANG Gong-hui4, JIANG Yao5, FANG Zheng1, TIAN Jing-li1   

  1. 1. College of Civil Engineering, Central South University, Changsha, Hunan 410075, China; 2. Institute of Geographic Sciences and Natural Research, Chinese Academy of Science, Beijing 100101, China; 3. College of Civil and Environmental Engineering, Saitama University, Saitama, Japan; 4. Disaster Prevention Research Institute, Kyoto University, Kyoto, Japan; 5. Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China
  • Received:2020-08-07 Revised:2020-12-30 Online:2021-03-11 Published:2021-03-15
  • Supported by:
    This work was supported by the Special Funds of National Natural Science Foundation of China (41941017), the Young Scholars of National Natural Science Foundation of China (41807278) and the Key Project of China Railway Technology Research and Development Plan(2017G007-D).

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Abstract: In recent years, surface tilt deformation of soil landslides has become an important indicator of landslide monitoring and early warning, but few studies have been done on the relationship between the slope surface tilt deformation and development characteristics of landslides. In this paper, a series of rainfall model tests combined with field tests was carried out to explore the relationship between the displacement and tilt deformation of slope surface in the process of landslide disaster evolution. A landslide warning method based on the curve of slope surface tilt deformation with time was established. The test results showed that the surface tilt deformation of soil landslides accelerates in the failure stage. There is a linear relationship between the reciprocal of tilt rate and the residual time of landslide before the failure, which can be used to predict the final failure time of landslides. In addition, in the process of landslide sliding, the surface tilt deformation and displacement of the landslide also show a linear correlation, and the corresponding slope is consistent with the sliding radius. The findings reveal, for the first time, the relationship between the slope surface tilt deformation and the geometric characteristics of the sliding zone, also provide the experimental basis for the prediction method of landslide sliding zone based on slope tilt surface deformation.

Key words: development characteristics of landslides, slope surface tilt deformation, slope surface displacement, sliding surface

CLC Number: 

  • TU457
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