水资源与水工程学报2024，Vol.35Issue(4)：169-178,10.DOI:10.11705/j.issn.1672-643X.2024.04.20
隧道弃渣级配碎石细观力学参数研究
Mesoscopic mechanical parameters of graded aggregates from tunnel waste slug
摘要
Abstract
The application of tunnel waste slug,which is employed as road base fill,can effectively re-duce resource wastage and environmental pollution.However,when it is studied as a continuous medium by means of finite element methods,there are inherent limitations.Moreover,in discrete element simula-tions of granular materials,the influence of mesoscopic parameters on the macroscopic mechanical proper-ties of the material remains unclear.Based on triaxial compression tests and numerical simulations,this study employs the orthogonal analysis to control parameter variations,so as to reveal the correlation be-tween granular mesoscopic parameters and macroscopic mechanical properties.Thus the impact of meso-scopic parameters on the road mechanical characteristics of graded tunnel waste slug is clarified.The re-sults indicate that among the mesoscopic parameters,shear bond strength has the most significant impact on cohesive strength,whereas the friction coefficient exhibits a closer relationship with the internal fric-tion angle;the initial Young's modulus is negatively correlated with the stiffness ratio,while other pa-rameters having negligible impact.In the variation relationship related to Poisson's ratio,the stiffness ra-tio has a more pronounced influence than the others.These research findings can not only provide a refer-ence for the calibration of mesoscopic parameters in particle flow simulations of graded aggregate but also offer a basis for the research on mechanical properties of graded aggregates as road base fill.关键词
隧道弃渣/级配碎石/颗粒流模拟/三轴压缩试验/细观参数Key words
tunnel waste slug/graded aggregate/particle flow simulation/triaxial compression test/me-soscopic parameter分类
交通工程引用本文复制引用
岳夏冰,董耿志,丁同,蒋双全..隧道弃渣级配碎石细观力学参数研究[J].水资源与水工程学报,2024,35(4):169-178,10.基金项目
国家重点研发计划项目(211221220042) （211221220042）
四川交通运输厅项目(2020-ZL-B1) （2020-ZL-B1）
陕西省重点研发计划项目(2018GY-155) （2018GY-155）
陕西省科学技术研究与发展计划项目(2016NY-218) （2016NY-218）
