路基工程Issue(6)：37-45,9.DOI:10.13379/j.issn.1003-8825.202305041
基于离散元的砂砾石填料压实特性研究
Investigation of Compaction Characteristics of Sand-Gravel Filler Based on the Discrete Element Method
摘要
Abstract
In order to investigate the macroscopic compaction characteristics and fine compaction mechanism of sand-gravel filler in the vibration process,the discrete element method was used to simulate the vibration compaction test,analyze the effects of the number of rolling passes and paving thickness on the macroscopic compaction characteristics of the fill materials,and based on the distribution of the particle velocity and displacement and the contact relationship to reveal the fine compaction mechanism.The results show that the numerical model can better simulate the compaction process of roadbed in the field,and the effective compaction depth of weak vibration on sand-gravel filler is around 252 mm;in the vibratory compaction of sand-gravel filler,coarse particles and fine particles tend to have different divisions.Coarse particles act as a stabilizing skeleton structure and can effectively conduct forces.The fine particles mainly fill the skeleton structure in the form of free particles to promote further compacting of the fill material.关键词
砂砾石填料/离散元法/压实特性/有效深度/颗粒运动/颗粒接触Key words
sand-gravel filler/discrete element method/compaction characteristics/effective depth/particle movement/particle contact分类
交通工程引用本文复制引用
梁立峰,赖仁桂,刘顺凯..基于离散元的砂砾石填料压实特性研究[J].路基工程,2023,(6):37-45,9.基金项目
国家自然科学基金项目(51478481),湖南省教育厅科学研究项目(22C0250) （51478481）
