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5 mm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。
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 1 mm,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.
作者
刘家兴
LIU Jiaxing(Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education,Hohai University,Nanjing 210098,China;Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing 210098,China)
出处
《河北工程大学学报（自然科学版）》
CAS
2019年第3期46-50,共5页
Journal of Hebei University of Engineering:Natural Science Edition
基金
国家自然科学基金资助项目(51578213)
