考虑结构构成的冰水堆积体变形破坏分析

doi:10.13722/j.cnki.jrme.2017.1232

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Abstract The glacial deposit is a typical soil–rock mixture. Its mechanical property is strongly affected by its structural composition. The bearing capacity of glacial deposit losses gradually when it suffers from gravity or other kinds of loadings. In this study，the algorithm of random rock block generation was used to reconstruct the meso structure of the glacial deposit. The ultimate shear strain under uniaxial pressure was used as a parameter for failure analysis. The deformation and failure of the glacial deposit with different structures and composition under uniaxial pressure was then simulated to understand the deformation process and failure law. Numerical simulations indicate that：(1) The glacial deposit under uniaxial pressure exhibits a significant phenomenon of getting round stone blocks during the shear deformation and failure process；(2) Both the shear strain zone and the ultimate shear strain increase with the increase of the content of rock block, besides the relationship between the ultimate shear strain and the content of rock block experiences an exponential growth. Results from the shear deformation and failure analysis of the glacial deposit with different inclinations of rock blocks show that：(1) The distribution of the shear strain zone under axial pressure always has good uniformity with the inclination of stone blocks；(2) The relationship between the ultimate shear strain and the inclinations of rock blocks takes on a shape of Λ. The random structure reconstruction method and the failure law of the glacial deposit can provide theoretical and technical reference for engineering safety and comprehensive reinforcement.

Key words： soil mechanics glacial deposit random structure reconstruction deformation and failure analysis ultimate shear strain

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	WANG Shengnian1
	ZHU Yin1
	LI Yue 2

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WANG Shengnian1,ZHU Yin1,LI Yue 2. Deformation and failure analysis of the glacial deposit considering structure and composition[J]. , 2019, 38(S1): 3262-3270.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1232 OR https://rockmech.whrsm.ac.cn/EN/Y2019/V38/IS1/3262

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