Deformation Mechanism and Trend Research on a Creep Landslide in Sichuan Province of China

 

Guo Yufei

Doctoral Student School of engineering and technology, China University of GeoSciences, Beijing,
China; e-mail: YF.Guo2009@gmail.com

Yao Leihua

Professor School of engineering and technology, China University of GeoSciences, Beijing,
China; e-mail: yaolh@cugb.edu.cn

Zhou Pinggen

Professor
China Institute of Geo-Environment Monitoring, Beijing, China
e-mail: zhoupg@mail.cigem.gov.cn

Han Bing

Engineer China Institute of Geo-Environment Monitoring, Beijing, China
e-mail: hanb@mail.cigem.gov.cn

 

 ABSTRACT

The Xiakou landslide is located north of Ya’an City in the Sichuan province of China, at the transitional belt of the Sichuan Basin and the Tibetan Plateau, and 120 km from Yingxiu Town (the epicenter of the Wenchuan earthquake measuring 8.0 on the Richter scale). The Xiakou landslide is one of the most common and destructive landslides in the Ya’an area. This landslide was formed in a layer of colluvium and can be classified as a creep landslide. Monitoring data from 2006 to 2010 were used to analyze the deformation characteristics of the different parts of the landslide. The limit equilibrium method was employed to identify the influence of the water table to slope stability during different seasons. The deformation trend of the landslide was predicted by analyzing incline displacements before and after the Wenchuan earthquake. Based on these analyses, suggestions for the monitoring and early warning of the Xiakou landslide are proposed.

Keywords: Creep landslide; Landslide monitoring; Wenchuan earthquake; Deformation mechanism and trend

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