瓤打曲泥石流运动特征及参数研究

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Abstract Research purposes: The mud-rock flow ditch of Ruandaqu is located in the complex and dangerous mountainous area in southeast Tibet. The construction of a railway in Tibet is under planning to cross the mud-rock flow ditch. The parameters such as the movement characteristics and flow velocity of debris flow, peak flow, volume, the maximum accumulation thickness at a time, the impact force of overall debris flow and block stone under the action of rainstorm peak and ice avalanches swells are studied, to provide the basis for the project setting.
Research conclusions: (1) The mudslides in Rangdaqu have the basic conditions for the formation of large-scale debris flow disasters; (2) When the glacier retreats to the steep area of the glacier greater than 15°, it is prone to ice avalanche swells, which may form the disaster chain of "ice avalanche swells-glacial lake overflow-flood-debris flow"; (3) The parameters required for engineering settings such as bulk density of debris flow, debris flow velocity, peak flow, overall impact force of debris flow, rock impact force, total volume and maximum accumulation thickness of debris flow under the two working conditions of debris flow caused by heavy rain and ice avalanche swell are comprehensively studied; (4) The research result can provide reference for the analysis and calculation of the motion parameters of debris flow generated by ice avalanches and swells in the canyon area of southeastern Tibet.

Key words： Rangdaqu debris flow movement characteristics glacial lake swell

Received: 06 December 2021

PACS:	U212.22
	U212.35

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	MIAO Xiaoqi

Cite this article:

MIAO Xiaoqi. Research on the Movement Characteristics and Parameters of Debris Flow in Rangdaqu[J]. Journal of Railway Engineering Society, 2022, 39(4): 20-25.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I4/20

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