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Numerical Simulation of the Combined Slope Protection Effect of Living Stump and Bamboo Anchor

Abstract

Five slope states were selected to research deep protection effect of the living tree stump-bamboo anchor supporting structure. These five states were the natural slope state, the bamboo anchor slope protection state, and the living tree stump-bamboo anchor initial supporting state, living tree stumps-bamboo bolt mid-term support status, living tree stump slope protection status. Three-dimensional numerical models are established by Midas GTS/NX finite element software, and the force characteristics and stability of the living tree stump-bamboo anchor support structure were studied. The results show that: (1) Compared with natural slopes, the relative stability and safety factors of bamboo anchor slope protection, live tree stumps-bamboo anchor initial slope protection, live tree stumps-bamboo anchor mid-term slope protection, and live tree stump slope protection have increased by 18.6%, 19.7%, and 44.0%, 44.1%, it can be found that the living tree stump-bamboo bolt supporting structure has obvious deep protection effect. (2) In the initial supporting state of live tree stumps and bamboo anchors, the bamboo anchors have the largest stress value at the position where the bamboo anchors are buried at a depth of 5 m on the slope; The bamboo anchors in the fourth row and the fifth row are below the buried depth of 6 m on the slope, and the stress value of the bamboo anchors increases linearly. (3) The closer to the toe of the slope, the greater the tensile stress generated by the root system on the left side of the living tree stump, and the greater the compressive stress generated by the root system on the right side of the living tree stump. The research results can be used as an important basis for the new living tree stump-bamboo bolt support structure to effectively prevent and control deep-seated slope protection, and it is of great significance to expand the green technology for preventing and controlling deep-seated landslides.

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Data availability

The models and related experimental parameters involved in this article are provided by the relevant authors.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant no. 31971727) and the Hunan Provincial Natural Science Foundation of China (Grant Nos. 2018JJ3882, 2020JJ4944) and the project of Hunan Education department (Grant No. 18A162) and the Science and Technology Project of Hunan Provincial Emergency Management Department.

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HY contributed to the conception of the study; YL, XJ performed the experiment; RD, LH contributed significantly to analysis and manuscript preparation; PY performed the data analyses and wrote the manuscript; GL helped perform the analysis with constructive discussions.

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Correspondence to Hui Yang.

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The authors declared that they have no conflicts of interest to this work.

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Zhu, Y., Yang, H., Liu, Y. et al. Numerical Simulation of the Combined Slope Protection Effect of Living Stump and Bamboo Anchor. Geotech Geol Eng (2021). https://doi.org/10.1007/s10706-021-01902-z

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Keywords

  • Live stump
  • Bamboo anchor
  • Deep landslide
  • Force characteristics
  • Slope stability