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Landslides

, Volume 16, Issue 11, pp 2087–2101 | Cite as

Formation mechanism and characteristics of the Jinjiling landslide in Wushan in the Three Gorges Reservoir region, China

  • Guoqiang Yan
  • Yueping YinEmail author
  • Bolin Huang
  • Zhihua Zhang
  • Sainan Zhu
Original Paper

Abstract

The resettlement of residents to new urban areas in the Three Gorges Reservoir region, China, has generally adopted the local resettlement method, but engineering disturbances in conjunction with heavy rainfall have contributed to landslide instability. This paper discusses the influential factors and formation mechanism of the Jinjiling landslide in Jiangdong District, Wushan County, Chongqing, China. This study concludes that the cutting and filling of slopes have led to loading of the rear edge and open cut excavation at the downhill side of landslide. More importantly, the filling of channels with surface soil has blocked the surface water discharge channel along the landslide body, thereby transforming surface water into groundwater. Therefore, under heavy rainfall, the groundwater level in the Jinjiling landslide rose substantially, resulting in large deformation in approximately August 1, 2018. After emergency treatment, including groundwater pumping, the landslide deformation slowed considerably. The rising groundwater caused by filling of the slope was the key factor influencing the landslide. Based on the deformation characteristics and formation mechanism of the landslide, comprehensive control measures referred to as the “drainage+unloading+support” scheme are proposed, and drainage should be the focus of this type of landslide protection project. The results of this study may provide a reference for similar slope engineering projects.

Keywords

Three Gorges Reservoir region Slope engineering Jinjiling landslide Formation mechanism Comprehensive treatment 

Notes

Funding information

This study was supported by the National Key R&D Program (ID: 2018YFC1504803), the Geological Hazard Prevention and Control Project for Follow-up Work of the Three Gorges (ID: 000121 2019C C60 001 and 2018102849), and the Project from China Geological Survey (DD20190637).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of EngineeringChina University of GeosciencesWuhanChina
  2. 2.China Institute of Geo-environment MonitoringBeijingChina
  3. 3.Hubei Key Laboratory of Disaster Prevention and MitigationChina Three Gorges UniversityYichangChina
  4. 4.208 Geological TeamChongqingChina

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