运动场地地形条件对碎屑流动力特征的影响研究

doi:10.13722/j.cnki.jrme.2019.0490

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Abstract The moving distance of the dry granular flow and its impact force on concrete structures are important indices to evaluate the disaster risk. The prime factor which plays an influential role in moving distance and impact force of dry granular flow is the topographic conditions. Based on the three topographic conditions(the concave topography，the slope-toe topography，and the tiered topography) of dry granular flow for a village in mountainous terrain，this paper analyzes the influence of topographic conditions on dry granular flow，accumulation distance and impact on structures，from the energy evolution point of view. The results indicate that，for concave topographic conditions，the kinetic energy conversion of the dry granular flow is higher with longer distance，the extent of damages is high and the impact force on the retaining wall at the toe of the slope is smaller. While for the slope-toe topography，the kinetic energy conversion rate of the dry granular flow is lower，the flow distance is shorter，the extent of damages is smaller and the impact force on retaining wall at the toe of the slope is higher. Under the same initialization mechanism of dry granular flow，the peak impact force for the tiered topography decreases faster than the concave topography，with the increase of distance between retaining wall and the toe of the slope. The results of this research can be a potential reference for the assessment of disaster risk mitigation and design of retaining structures for landslides or collapse granular flows.

Key words： slope engineering topography conditions energy evolution impact force granular flows discrete element modeling

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	Articles by authors
	HU Xiaobo1
	2
	FAN Xiaoyi3
	4
	JIANG Yuanjun2

Cite this article:

HU Xiaobo1,2,FAN Xiaoyi3, et al. Study on the influence of topography conditions on the dynamic characteristics of dry granular flow[J]. , 2020, 39(S1): 2940-2953.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0490 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/IS1/2940

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