Abstract
A large number of loose piles formed by mountain hazards are highly susceptible to hydraulic erosion under rainfall conditions. The use of ecological substrate materials for erosion control and ecological restoration of gravel soil slopes has become a current research hotspot and the study difficulty. The post-earthquake slump accumulation gravel soil in Jiuzhaigou was selected as the research object, and the self-developed modified glutinous rice-based material was used to reinforce the gravel soil. The variable slope flume erosion test and rainfall simulation test were carried out to study the water erosion resistance of the material reconstructed soil under the influence of runoff erosion and raindrop splash erosion. The results show that: As the material content reached 12.5%, the reconstructed soil did not disintegrate after 24 hours of immersion, the internal friction angle was increased by 42.26%, and the cohesion was increased by 235.5%, which played a significant reinforcement effect. In the process of slope erosion, the soil rill erodibility parameter Kr was only 3‰ of the gravel soil control group, the critical shear force τ increased by 272%, and the soil erosion resistance was significantly improved. In the process of rainfall and rainfall on the slope, the runoff intensity of the reconstructed soil was stable, and the ability to resist runoff erosion and raindrop splash erosion was enhanced. The maximum value of soil loss rate on different slope slopes is 0.02–0.10 g·m−2s−1, which is significantly lower than that of the control group and has better erosion reduction effect.
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Change history
21 February 2024
An Erratum to this paper has been published: https://doi.org/10.1007/s11629-023-8410-1
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Acknowledgements
This study was jointly funded by the Sichuan Provincial Natural Science Foundation of China (Grant No.2023NSFSC0378) and the Jiuzhaigou Lake Swamp and River Ecological Restoration Research Project (N5132112022000246).
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ZHANG Weng-xiang: Methodology, Visualization, Formal analysis, Writing-original draft, Writing-review & editing. PEI **ang-jun: Methodology, Conceptualization, Supervision & editing. ZHANG **ao-chao: Methodology, Visualization, Supervision & editing. WU Xue-min: Investigation & Methodology. XIAO Wei-yang: Funding curation & Investigation. QIN Liang: Supervision & Conceptualization. ZHU **-yu: Investigation & Methodology.
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Zhang, Wx., Pei, Xj., Zhang, Xc. et al. Influence law of modified glutinous rice-based materials on gravel soil reinforcement and water erosion process. J. Mt. Sci. 20, 3552–3567 (2023). https://doi.org/10.1007/s11629-023-8271-7
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DOI: https://doi.org/10.1007/s11629-023-8271-7