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Volume 41 Issue S2
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DAI Bei-bing, YANG Jun, LIU Feng-tao, LIN Kai-rong. Macro- and micro-properties and formation mechanisms of granular piles[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 57-60. DOI: 10.11779/CJGE2019S2015
Citation: DAI Bei-bing, YANG Jun, LIU Feng-tao, LIN Kai-rong. Macro- and micro-properties and formation mechanisms of granular piles[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(S2): 57-60. DOI: 10.11779/CJGE2019S2015
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Macro- and micro-properties and formation mechanisms of granular piles

  • 1. School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China;
    2. Department of Civil Engineering, The University of Hong Kong, Hong Kong, China;
    3. School of Earth Science and Engineering, Sun Yat-sen University, Guangzhou 512075, China

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  • Received Date: April 28, 2019
  • Published Date: July 19, 2019
    Graphical Abstract
    • Abstract
  • A DEM study is carried out to simulate the construction of granular piles by considering various particle shapes. The underlying mechanisms are analyzed through the examination of the macro and micro-characteristics of granular piles. It is found that angle of repose decreases as particle shape evolves towards a regular pattern. Microscopically, the anisotropy magnitudes of contact orientation vectors, contact normal and tangential force vectors decrease as particle shape evolves from an irregular one to a regular one. The summation of the angle difference Δ?n between the principal anisotropy direction of contact orientation vectors and the vertical direction, with the angle of repose α, is almost a constant, and the angel differences Δ?f and Δ?t for the principal anisotropy directions of contact normal and tangential forces are revealed to be a linear function of angle of repose α. In addition, a relationship is also established between the direction where the most intense arching effect occurs and the principal anisotropy directions of contact orientation vectors, contact normal and tangential force vectors.
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    • References (13)
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