Abstract
By analyzing the geotechnical engineering conditions, multiperiod remote-sensing images, and numerical simulations, failure process of landfill slope prior to Shenzhen “12.20” landslide was revealed. This study results that Shenzhen Hong’ao landfill slope stability was influenced by the following four factors: (1) the multistage landfill method made the slope form a special binary structure with a front dense material and rear loose material; (2) the rise of the groundwater level generated relatively high pore–water pressure inside the sliding main body; (3) overloading and rapid filling increased the sliding thrust force; and (4) groundwater uplift in the middle of the slope formed a water contingency zone, that caused the front slope body to have a roof support effect, and excess pore water pressure was produced by the overfill in back slope body. Combined with the above conditions, the slope body formed a through sliding zone, and finally the slope body was unstable and formed a long runout landslide. Through the research and analysis, it was concluded that the Shenzhen “12.20” artificial landfill landslide belonged to the failure mode of the front slope stability decline and the rear CDW material driven under overloading and rapid filling. Therefore, it is necessary to strengthen the geotechnical engineering optimization design of drainage measures, landfill methods, and prevention measures during the process of CDW landfill construction.
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Acknowledgements
The authors express their gratitude to Professors Sijing Wang, Wenpei Wang, as well as Dr. Yong Cao for their kind support and help.
Funding
This study was supported by the Science Foundation of the Key Laboratory of Shale Gas and Geoengineering, the Institute of Geology and Geophysics, the Chinese Academy of Sciences, China (No. KLSG201705), and the National Key Research and Development Program of China “The Disaster Pattern and Risk Prevention Technology of Large landslide in Karst Mountain area” (No. 2018YFC1504806).
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We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work. There is no professional or personal interest of any nature in any product, service, and/or company that could be construed as influencing the position presented in or in the review of the manuscript entitled, “Failure Process Simulation Analysis of the Shenzhen “12.20” CDW Landfill Landslide: A Case Study.”
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Gao, Y., Yin, Y. & Li, B. Failure process simulation analysis of the Shenzhen “12.20” CDW landfill landslide: a case study. Arab J Geosci 14, 1094 (2021). https://doi.org/10.1007/s12517-021-07429-0
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DOI: https://doi.org/10.1007/s12517-021-07429-0