Abstract
The failure of landslide control project presents a deformation that continues to develop along the crack system, and the continuous failure of mechanical balance of the sliding body at the microscopic level. This paper takes the control project of the Baiyuzui landslide as an example, the main control factors for different deformation stages of the landslide are analyzed by the response surface method and the finite element method. Based on the numerical simulation results and field investigation data, the mechanical state and the transformation mechanism of failure modes of the landslide are discussed. The results indicate that slope shape and heavy rainfall are the main control factors for the failure of control project. In the initial excavation stage, the landslide is in a local slow regressive sliding failure mode; after the alteration of slope shape, the increment of sliding force promotes the transformation of failure mode to an entire intense progressive sliding; subsequently, excavation at the rear part reduces the rainwater infiltration path. The increment and dissipation of pore water pressure changes the failure mode of landslide to an entire slow progressive sliding mode. In the whole deformation process of landslide, the main control factors and failure mode vary with the control project progress. The findings of this study will provide experience and knowledge for control project of landslides.
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Acknowledgements
This study was financially supported by the National Natural Science Foundation of China (41972289, 41807264). The authors are grateful to the organizations that provided the aforementioned financial support.
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Du, Y., Yan, E., Gao, X. et al. Identification of the Main Control Factors and Failure Modes for the Failure of Baiyuzui Landslide Control Project. Geotech Geol Eng 39, 3499–3516 (2021). https://doi.org/10.1007/s10706-021-01707-0
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DOI: https://doi.org/10.1007/s10706-021-01707-0