Influence of aggregation angle of aggregated landslide debris flows based on discrete element model

YANG Kun; YE Yong; XIE Xuan

doi:10.19509/j.cnki.dzkq.tb20230564

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YANG Kun，YE Yong，XIE Xuan. Influence of aggregation angle of aggregated landslide debris flows based on discrete element model[J]. Bulletin of Geological Science and Technology，2025，44（2）：1-14 doi: 10.19509/j.cnki.dzkq.tb20230564

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Influence of aggregation angle of aggregated landslide debris flows based on discrete element model

doi: 10.19509/j.cnki.dzkq.tb20230564

College of Hydralic and Environmental Engineering, China Three Gorges University, Yichang Hubei 443002, China

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Author Bio:
E-mail：736120345@qq.com
Corresponding author: E-mail：yeyong@ctgu.edu.cn
Received Date: 10 Oct 2023
Accepted Date: 19 Feb 2024
Rev Recd Date: 06 Feb 2024

Available Online: 29 Mar 2024

Abstract

Abstract

Objective
Landslide debris flows are common geological disasters characterized by large scale, long sliding distances, and high speeds. The terrain of hillside ravines and valleys significantly influences the trajectory of these flows, causing them to block, turn, pile up, and exhibit a series of complex behaviors. Therefore, the movement path of landslide debris flows is not a simple straight line but is influenced by various terrain factors, resulting in complex and varied trajectories.
Methods
This study focuses on the aggregation behavior of landslide debris flows along different motion trajectories. Using EDEM software, we analyzed the impact and accumulation characteristics of symmetrically aggregated landslide debris flows at various aggregation angles.
Results
This study has reached results in three aspects. 1) Effect of the aggregation angle on movement velocity: Larger aggregation angles result in lower v_y values, higher degrees of separation of the landslide debris flow, and longer sliding times. 2) Effect of the aggregation angle on accumulation morphology: Larger aggregation angles cause the landslide to stabilize at the foot of the slope, with the accumulation zone lengthening on the slide side and decreasing in height at the blocking structure. 3) Effect on impact performance: Larger aggregation angles lead to lower and later peak impact forces on the barrier structure. Additionally, the residual impact force after the formation of a static accumulation area is lower and closer to the peak impact force.
Conclusion
These findings provide a fundamental basis for the in-depth study of the complex movement paths of landslide debris flows and offer theoretical references for optimizing landslide debris flow control structures.
- landslide debris flow,
- aggregation angle,
- kinematic properties,
- force of impact,
- discrete element,
- EDEM

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References(45)

References

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Influence of aggregation angle of aggregated landslide debris flows based on discrete element model

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Influence of aggregation angle of aggregated landslide debris flows based on discrete element model

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