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刘家兴.EPS颗粒整体集合的直剪试验研究[J].河北工程大学自然版,2019,36(3):46-50
EPS颗粒整体集合的直剪试验研究
Direct Shear Test on An Assembly of Many EPS Beads
投稿时间:2019-04-03  
DOI:10.3969/j.issn.1673-9469.2019.03.009
中文关键词:  EPS颗粒  直剪试验  抗剪强度  压缩量
英文关键词:EPS beads  direct shear test  shear strength  compression
基金项目:国家自然科学基金资助项目(51578213)
作者单位
刘家兴 河海大学 岩土力学与堤坝工程教育部重点实验室, 江苏 南京 210098
河海大学 岩土工程科学研究所, 江苏 南京 210098 
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中文摘要:
      为研究聚苯乙烯泡沫颗粒整体集合的抗剪强度特性,通过直剪试验,针对粒径为1、3及5mm的泡沫颗粒,测定了不同法向应力条件下剪应力与剪切位移之间的关系,分析了颗粒粒径及压缩性对抗剪强度的作用影响。结果表明:随着粒径的增加,EPS颗粒整体集合的抗剪强度逐渐降低;当EPS颗粒粒径由1 mm增加至5 mm时,其整体的内聚力由8.1 kPa减小至2.75 kPa,内摩擦角也随之减小,其原因在于EPS颗粒整体集合的压缩量随粒径的增加而增大。
英文摘要:
      In order to study the shear strength characteristics of an assembly of many Expanded Polystyrene beads,direct shear tests were carried out to investigate the relationship between shear stress and shear displacement under different normal stress conditions.The effects of particle size and compressibility on shear strength were analyzed for the beads with particle sizes of 1mm,3 mm and 5 mm.The results show that the shear strength of an assembly of many EPS beads decreases with the increase of particle sizes.The cohesion of the assembly decreases and the internal friction angle decreases from 8.1 kPa to 2.75 kPa when the particle sizes of EPS increases from 1 mm to 5 mm.The reason is that the compression of an assembly of EPS beads increases with the increase of particle sizes.
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