Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (4): 1063-1072.doi: 10.13278/j.cnki.jjuese.20180082

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Mechanism and Mitigation Measures of Qishan Landslide of Yongtai in Fujian Province

Chang Xiaojun1,2, Ge Weiya2, Yu Yang3, Zhao Yu4, Ye Longzhen1, Zhang Taili2, Wei Zhenlei4   

  1. 1. Key Laboratory of Geohazard Prevention of Hilly Mountains, Ministry of Land and Resources, Fuzhou 350002, China;
    2. Nanjing Center of China Geological Survey, Nanjing 210016, China;
    3. Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China;
    4. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
  • Received:2018-04-20 Online:2019-07-26 Published:2019-07-26
  • Supported by:
    Supported by Open-Fund of Key Laboratory of Geohazard Prevention of Hilly Mountains,Ministry of Land and Resources (2015k001), National Science Foundation of Zhejiang Province (LQ17D020001) and Zhoushan City-Ocean College of Zhejiang University Joint Fund (2017C82220)

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Abstract: In order to clarify the mechanism of rainfall-induced landslides and to determine the basis of prevention and control, the Dongmen Qishan landslide was fully studied. The landslide occurred in Yongtai County, Fujian Province. Based on detailed geological survey and monitored displacement during rainfall period, the mechanism of landslide activation was studied from the perspectives of geological condition and influencing factors. The evolution of the landslide was investigated by using Geostudio, and on which landslide control can be divided into two main steps. The first step is emergency mitigation, in which drainage is designed to decrease groundwater level in the landslide. Based on the analysis of the relationship between rainfall and landslide deformation velocity, the drainage is to be installed in the lower part of landslide. The second step is to install stabilizing piles. Based on numerical and theoretical analyses, the stabilizing piles should be installed in the lower part of the landslide. The diameter, net spacing and center-to-center spacing are 1.0 m, 2.0 m and 3.0 m, respectively.

Key words: landslide, rainfall, landslide mitigation, numerical simulation, theoretical analysis

CLC Number: 

  • TU42
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