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Study of the dynamics of water-enriched debris flow and its impact on slit-type barriers by a modified SPH–DEM coupling approach

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Abstract

Slit-type barriers serve as active countermeasures against debris flow. However, the dynamic interaction between debris flows and slit-type barriers is extremely complicated. To model the fluid-solid behavior of debris flows, a coupled approach of smoothed particle hydrodynamics (SPH) and discrete element method (DEM) is developed. We use the model to investigate the dynamics of how debris flows impact slit-type barriers. The proposed approach is able to simulate the embedding of arbitrarily shaped particles in viscous debris flows. A GPU acceleration technique is employed to overcome large computational costs. The approach is first validated by comparing numerical results to experimental observations for some standard conditions. Subsequently, experiments of the impact of water-enriched debris on slit-type barriers are modeled and validated. Moreover, the effects of barrier arrangement, solid volume fraction and boulder shape on debris-barrier interactions are further explored. This study analyzes the interaction between debris flows and slit-type barriers by coupled SPH–DEM and provides insight into the optimal design of barriers.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52208354, 52090084 and 51938008).

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Authors and Affiliations

  1. Key Laboratory of Coastal Urban Resilient Infrastructures (MOE), Shenzhen University, Shenzhen, China

    Hao Xiong, Mengjie Hao, Debo Zhao, Yuanyi Qiu & Xiangsheng Chen

  2. State Key Laboratory of Intelligent Geotechnics and Tunnelling, Shenzhen University, Shenzhen, China

    Hao Xiong, Mengjie Hao, Debo Zhao, Yuanyi Qiu & Xiangsheng Chen

  3. National Engineering Research Center of Deep Shaft Construction, Shenzhen University, Shenzhen, China

    Hao Xiong, Mengjie Hao, Debo Zhao & Xiangsheng Chen

  4. College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, China

    Hao Xiong, Mengjie Hao, Debo Zhao, Yuanyi Qiu & Xiangsheng Chen

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Xiong, H., Hao, M., Zhao, D. et al. Study of the dynamics of water-enriched debris flow and its impact on slit-type barriers by a modified SPH–DEM coupling approach. Acta Geotech. 19, 1019–1045 (2024). https://doi.org/10.1007/s11440-023-02106-w

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