铁道科学与工程学报2016，Vol.13Issue(7)：1379-1385,7.
不连续岩体中的隧道施工全过程离散单元法仿真研究
Si mulation study of tunnel construction process in discontinuous rock by discrete ele ment method
摘要
Abstract
The Discrete Element Method (DEM)is verified to be suitable for the simulation of discontinuous media (e.g.,jointed rock mass),but the actual operation is more difficult.How to accurately simulate every aspect of the tunnel excavation and support is critical for reliability of the results.Based on Doupengshan tunnel of Guiguang railway,the whole process of tunnel excavation,i.e.,primary support and secondary lining were simulated.The study shows that the surrounding rock deformation,internal force of primary support,and axial force of anchor bolt are improved with increasing fragmentation degrees of surrounding rock.The primary support is the determinant of constraint of surrounding rock deformation and bears the load after tunnel excavation.Secondary support only be-haves as a permanent support structure and a safety margin,and its internal force is small as compared to that of the primary support.The decreasing physical and mechanical parameters of the surrounding rock excavation,rheol-ogy of soil and reducing of mechanical properties of primary support material were taken into account .The second-ary lining should be calculated and designed as force structure.关键词
隧道工程/不连续体/施工过程/离散单元法Key words
tunnel engineering/discontinuity rock/construction process/discrete element method分类
建筑与水利引用本文复制引用
吴建文,张恒,孙建春,林放..不连续岩体中的隧道施工全过程离散单元法仿真研究[J].铁道科学与工程学报,2016,13(7):1379-1385,7.基金项目
中央高校基本科研业务费专项资金资助项目（SWJTU11 ZT33）；教育部创新团队发展计划资助项目 （）
