河南城建学院学报2018，Vol.27Issue(2)：66-71,6.DOI:10.14140/j.cnki.hncjxb.2018.02.011
土石混合料振动压实特性的三维离散元分析
Three-dimensional discrete element analysis of vibratory compaction characteristics of soil-rock mixture
摘要
Abstract
In order to explore the influence of experimental conditions and particle mesoscopic parameters on the compaction effect of three-dimensional discrete element model of soil-rock mixture,a vibratory compaction test model for soil-rock mixture surface was established based on three-dimensional discrete element method. Assuming that the density of coarse and fine particles is the same and the influence of moisture content is not considered,the porosity is taken as the quantitative evaluation index of the compaction quality of the simula-tion test.Firstly,the influence of the content of stone and the maximum particle size on the compaction effect was analyzed by simulation test,and compared with the results of indoor test,the reliability of the simulation test was verified.On this basis,the influence of experimental conditions and the mesoscopic parameters on the compaction effect was analyzed.The simulation results show that:(1)In terms of test conditions,the porosity decreases with the ratio of the diameter of the test cylinder to the maximum diameter of the particles;the po-rosity increases with the increase of the vibration frequency of the load;when the rigidity of the test cylinder increases,the porosity first Increased and then decreased;(2)In terms of meso-parameters,the particle fric-tion coefficient has a weak influence on the porosity,and with the increase of particle stiffness and damping coefficient,the porosity increases gradually.关键词
土石混合料/离散元/振动压实/孔隙率/细观参数Key words
soil-rock mixture/discrete element/vibratory compaction/porosity/meso-parameter分类
建筑与水利引用本文复制引用
王团结,李新明..土石混合料振动压实特性的三维离散元分析[J].河南城建学院学报,2018,27(2):66-71,6.基金项目
国家自然科学基金(51509274) （51509274）
