冰岩崩碎屑流堵江及溃坝模型试验研究

doi:10.3724/1000-6915.jrme.2024.0037

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Abstract The landslide dams formed by rock-ice avalanches are a common geological hazard in the alpine and cold mountainous areas in the southwest of China. The effects of ice content and spatial location of ice-rock materials on the formation morphology，dam failure process，and stability of debris dams were researched by large-scale flume experiments. The results indicate that ice debris enhance the mobility of debris material，leading to increased blockage in the riverbed. Ice debris are influenced by particle segregation，primarily accumulating on the upper part of the landslide dams and on the opposite bank of landslide. Under the impact of water flow，ice debris within the landslide dams melt rapidly，thereby increasing the porosity of the dam body and weakening the resistance to erosion，resulting in the formation of deeper and wider breach outlets and accelerating the dam failure process. Additionally，a dimensionless stability evaluation method( ) for landslide dams containing ice is proposed. Evaluation results demonstrate a linear decrease in the stability of the landslide dam with increasing ice content.

Key words： geological engineering rock-ice avalanche landslide-dammed formation mechanism breach process landslide dam stability flume test

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	Articles by authors
	LIU Darui1
	FAN Gang1
	LIN Ziyu1
	LI Congjiang1
	YANG Xingguo1
	2
	ZHOU Jiawen1
	2

Cite this article:

LIU Darui1,FAN Gang1,LIN Ziyu1, et al. Physical model tests on landslide dam caused by rock-ice avalanches[J]. , 2025, 44(S1): 101-112.

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https://rockmech.whrsm.ac.cn/EN/10.3724/1000-6915.jrme.2024.0037 OR https://rockmech.whrsm.ac.cn/EN/Y2025/V44/IS1/101

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