碎屑流冲击刚性挡墙的力学模型研究

doi:10.13722/j.cnki.jrme.2018.0762

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Abstract Retaining walls are often seriously damaged by the dry granular flow resulted from a landslide or a collapse. Laboratory modeling tests were carried out, and an impact force model of the protective structure against the impact of granular flows，for calculating the normal impact force，the tangential impact force and the action point of the normal force，was established based on the granular flow impact process of 64 groups of experiments. The maximum impact force and the residual force obtained from tests were compared with Ashwood model，model and the proposed model. The results show that the impact forces calculated by the developed model and the Adel model are consistent with the experimental results，while the normal impact force calculated by Ashwood model is smaller than the experimental result. Assuming that the base reaction force acts at 2/3 of the deposition length of the dead zone，the action point of the normal force calculated by the new model is closest to the experimental result. Both the maximum normal force and the tangential force increase with increasing the base friction angle，while only the tangential force is obviously influenced by the friction angle of the retaining wall. The research results provide a reference for the disaster mitigation design of landslides or collapse granular flows.

Key words： slope engineering model experiment granular flows rigid wall impact force friction angle

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	Articles by authors
	SUI Jing1
	JIANG Yuanjun2
	FAN Xiaoyi1
	3
	SONG Yue2
	4
	HUANG Cheng1

Cite this article:

SUI Jing1,JIANG Yuanjun2,FAN Xiaoyi1, et al. An impact model of granular flows on a rigid wall#br#[J]. , 2019, 38(1): 121-132.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0762 OR http://www.rockmech.org/EN/Y2019/V38/I1/121

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