摘要
土体渗透系数是关系工程稳定性、安全性的关键因素。土体是一种散粒体材料,已有研究多关注颗粒级配、密实度、颗粒大小对渗透系数的影响。为研究颗粒形态这一关键微观特征对土体渗透系数的影响,采用孔隙流体渗流过程数值模拟方法,研究了球形颗粒和多面体颗粒试样的渗透系数。结果表明,颗粒形状越复杂,孔隙形状的复杂程度越高,渗透系数因而越低。多面体颗粒试样的渗透系数明显小于球形颗粒试样,两者比值在35%到50%之间。
The permeability coefficient of soil plays crucial role in controlling the stability and safety of engineering projects.Soil is a kind of granular material and previous studies mainly focused on the influences of particle size distribution,packing density and particle size on the permeability.To study the effects of particle shape on permeability,the numerical simulations of fluid flow in the inter-particle pores were adopted to study permeability coefficient of spheroidal particles and angular polyhedral particles.The results show that,with the increase of particle angularity complexity,the shape complexity of pores increases as well,leading to reduced permeability.The permeability coefficient of polyhedral particle sample is obviously lower than its of spheroidal particle sample,the ratio of which is between 35%and 50%.
作者
骆莉莎
周昕
林军
LUO Li-sha;ZHOU Xin;LIN Jun(Jiangsu Open University,Nanjing 210000,Jiangsu)
出处
《湖南工业职业技术学院学报》
2021年第1期93-96,共4页
Journal of Hunan Industry Polytechnic
基金
国家自然科学基金资助项目(项目编号:51908250)。
关键词
粗粒土
渗透系数
颗粒形状
数值模拟
coarse grained soil
permeability coefficient
particle shape
numerical simulation
