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Research on the blocking effect of baffle-net structure on rock avalanches: consider the influence of particle splashing

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Abstract

This paper discussed the changes in the movement trajectories and deposition patterns of the rock avalanches in the baffle-net structure under different cases, and obtained the optimal layout parameters of the baffle-net structure in terms of protection effect. The results showed that (1) the particles leaking from the gap between the baffle groups and flowing around the baffle sides were mainly concentrated in Regions I (0 ~ 34 cm) and II (34 ~ 68 cm) behind the baffles, and the movement range of such particles was relatively small, with low risk; while the splash particles of the rock avalanches were concentrated in Region IV (102 ~ 137 cm) behind the baffles, the movement range of such particles was far, with high risk; (2) when the flexible net structure of the first row of baffles was arranged, the blocking rate increased with the increase of the protective net coverage; when the coverage was 100% (case 7), the particle blocking rate behind the baffles reached 52.2%; (3) under the case of 100% coverage, we considered the multi-row baffle-netting, where the case 10 had the highest blocking rate, higher than cases 7, 8, and 9, and the case 10 had the least particle splashing, which was the optimal layout of the baffle-net structure.

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Data availability

The data that support the findings of this study are available from the corresponding author, Dongpo Wang, upon reasonable request.

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Acknowledgements

The authors thank all anonymous reviewers for helpful suggestions.

Funding

This work was supported by the State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project (SKLGP2021Z001), Sichuan Science and Technology Plan Project (2023YFS0444), National Key Research and Development program of China (Project No.2022YFF0800604), the Major Program of the National Natural Science Foundation of China (Grant No.42090051), and the National Natural Science Foundation of China (Grant No. 42207232).

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Authors and Affiliations

  1. College of Civil Engineering, Fuzhou University, Fuzhou, 350108, Fujian, China

    Yu-Zhang Bi

  2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, Sichuan, China

    Dong-Po Wang, Shuai-Xing Yan & Qin-Ze Li

  3. Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China

    Si-Ming He

  4. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China

    Si-Ming He

  5. Chinese Academy of Sciences Center for Excellence in Tibet Plateau Earth Sciences, Beijing, 100101, China

    Si-Ming He

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  1. Yu-Zhang Bi
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  2. Dong-Po Wang
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  3. Shuai-Xing Yan
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  4. Qin-Ze Li
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Correspondence to Dong-Po Wang.

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Bi, YZ., Wang, DP., Yan, SX. et al. Research on the blocking effect of baffle-net structure on rock avalanches: consider the influence of particle splashing. Bull Eng Geol Environ 82, 277 (2023). https://doi.org/10.1007/s10064-023-03289-y

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