Comprehensive Assessment on Sanzhouxi Landslide Stability Considering Displacement Monitoring

 

Ying Cao

China University of Geosciences (Wuhan), 388th, Lumo Road, Wuhan 430074, China
e-mail: caoying_sophia@126.com

Kunlong Yin *

Professor, China University of Geosciences (Wuhan), 388th, Lumo Road, Wuhan 430074, China
*Corresponding Author; e-mail: yinkl@126.com

Chao Zhou

China University of Geosciences (Wuhan), 388th, Lumo Road, Wuhan 430074, China

 

 ABSTRACT

Researching from the perspective of the actual deformation data of landslide, and combining with the results of R/S analysis, we can make more accurate analysis on the stability and deformation trend of landslide. Therefore, in this paper, taking the Sanzhouxi landslide in the Three Gorges Reservoir as an example, the writer analyzes the long-term monitoring data of the landslide and proposes the R/S analysis method (Rescaled Range Analysis) to calculate the values of Hurst of the overall accumulation displacement-time series and incremental displacement-time series respectively, which reflect the deformation trend of landslide. Finally, based on the data of the ground surface monitoring system, the response relationship between the ground surface deformations, the groundwater table, the monthly rainfall and reservoir water level is obtained. The results suggest that, there is a widely spacial difference in the deformation of the Sanzhouxi landslide, under the influences of rainfall and water level changes, the deformation mainly represents on the leading edge with an apparent trend as well. Sanzhouxi is a retrogressive landslide, the trailing edge sliding body of which is still in a relatively stable state at present. The faster the water level changes, the greater the varied range of the surface cracks’ width is, and the more unstable the landslide will be.

Keywords: displacement monitoring; R/S analysis method; Sanzhouxi landslide; Three Gorges Reservoir area

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