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Grain Size Distribution Analysis of Landslide Dams Caused by Dynamic Accumulation of Weathered Rock Landslides Using Discrete Element Modelling

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Computational and Experimental Simulations in Engineering (ICCES 2023)

Part of the book series: Mechanisms and Machine Science ((Mechan. Machine Science,volume 143))

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Abstract

The differences in the structure and composition materials of landslide dams often lead to great dissimilarity in dam stability, which often depend on the dynamic accumulation process of landslide dam. In order to investigate the response of dynamic characteristics of landslide to the composition material distribution of landslide dams, the migration and accumulation process of rock slopes with two weathering degrees was simulated by bonded particles and micro-cracks based on discrete element modelling. A new reconstructed distribution identification method was proposed in this paper to quantify the grain size distribution of dam. The results showed that the composition materials of dam, formed by weakly weathered slope, was poorly sorted, with medium particles located in surface layer, coarse particles located in middle and fine particles located in bottom of the valley. The material composition of dam, formed by strongly weathered slope, was well sorted, which spatial distribution showed well reverse segregation structure. It was found that the differences in particle size distribution between two kinds of landslide dams were mainly manifested in fine particles and coarse particles. The kinetic disintegration in weakly weathered slope was weakened, due to the accumulation of force coupling below hard rock at substrate, which occurred because of the fragmentation of particles aside it. As a result, there are more coarse particles and fewer fine particles in grain size distribution of its accumulation dam. This paper contributes to a better understanding of the structure and materials distribution of landslide dams, and assists the prediction of the stability of landslide dams.

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Acknowledgements

The authors acknowledge the support from the Natural Science Foundation of China (No. 42061160480, 42071010), the Shanghai Natural Science Foundation (20ZR1461300), and the Hunan Water Conservancy Science and Technology Project (XSKJ2019081-47).

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Authors and Affiliations

  1. Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai, China

    Ming Peng, Qingxi Zhao & Qingxin Zhao

  2. Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai, China

    Ming Peng, Qingxi Zhao & Qingxin Zhao

  3. Institute of Geotechnical Engineering, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, China

    Danyi Shen

  4. Shanghai Research Center of Ocean & Shipbuilding Engineering, China Shipbuilding NDRI Engineering Co., Ltd., Shanghai, China

    Yan Zhu

  5. State Key Laboratory Hydraulic & Mountain River Engineering, Sichuan University, Chengdu, China

    Jiawen Zhou

  6. School of Computer and Communication Engineering, Changsha University of Science and Technology, Changsha, China

    Shuo Cai

Authors
  1. Ming Peng
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  2. Qingxi Zhao
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  3. Danyi Shen
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  4. Yan Zhu
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  5. Qingxin Zhao
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  6. Jiawen Zhou
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  7. Shuo Cai
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Corresponding author

Correspondence to Danyi Shen .

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Editors and Affiliations

  1. Dept of Civil and Env'l Engg, University of California, Berkeley, Berkeley, CA, USA

    Shaofan Li

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Peng, M. et al. (2024). Grain Size Distribution Analysis of Landslide Dams Caused by Dynamic Accumulation of Weathered Rock Landslides Using Discrete Element Modelling. In: Li, S. (eds) Computational and Experimental Simulations in Engineering. ICCES 2023. Mechanisms and Machine Science, vol 143. Springer, Cham. https://doi.org/10.1007/978-3-031-42515-8_27

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  • DOI: https://doi.org/10.1007/978-3-031-42515-8_27

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-42514-1

  • Online ISBN: 978-3-031-42515-8

  • eBook Packages: EngineeringEngineering (R0)

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