格栅–砂土界面宏细观关联性与加筋性能评价方法研究

doi:10.13722/j.cnki.jrme.2014.1433

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Abstract The interface characteristic of geogrid and compacted materials plays an important role in the design of reinforced soil structures. The pull-out test of triaxial geogrid was conducted by 3-D discrete element method to investigate the correlation between macro and meso mechanical responses. Simultaneously，the influence of particle size on reinforcement effect was discussed. The mechanical behavior of reinforced soil and geogrid under pull-out loading was systematically analyzed. The evolution law of the pull-out force and mesoscopic fabric anisotropy indices was shown. Based on the pull-out test results，an assessment method was established to estimate the reinforcement effect of geogrid. Numerical results reveal that the velocity vector of particles in the interfaces can reflect the interaction between geogrid and soil instantaneously. The fabric anisotropy coefficient is suitable to describe the development of macroscopic strength. In a certain particle size scope，the reinforcement effect would be primarily controlled by the specific surface area of grain system and the critical edge load of reinforced soil would decrease with the increase of particle size.

Key words： soil mechanics geogrid pull-out test interface properties fabric anisotropy reinforced performance

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	Articles by authors
	MIAO Chenxi1
	ZHENG Junjie1
	CUI Lan1
	CUI Mingjuan1
	ZHAO Jianbin2

Cite this article:

MIAO Chenxi1,ZHENG Junjie1,CUI Lan1, et al. Study of the macro-meso correlation of geogrid-soil interface and assessment method of reinforced performance[J]. , 2016, 35(S1): 3249-3258.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.1433 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3249

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