华侨大学学报（自然科学版）2025，Vol.46Issue(1)：30-37,8.DOI:10.11830/ISSN.1000-5013.202405024
节理岩体中大跨隧道围岩变形破坏模式分析
Analysis of Deformation and Failure Mode of Surrounding Rock of Long-Span Tunnel in Jointed Rock Mass
摘要
Abstract
Using 3DEC discrete element software,a model of long-span tunnel with different joint distribu-tions is established.Considering the strikes,dip angles,spacing and mechanical parameters of joints,the de-formation and failure of surrounding rocks without support of the long-span tunnel after excavation is simulated and analyzed.The research results show that the risk position of the long-span tunnel surrounding rock after excavation is mainly determined by the strikes and dip angles of the joints.The instability and falling of blocks in this position are determined by the joint spacing and mechanical parameters.When considering the bidirec-tional combination joints,the surrounding rocks are more complex than the unidirectional joints.The deforma-tion and failure forms of the tunnel surrounding rocks not only present a certain laws in the cross section,but also present difference in the tunnel axis.The X-direction joints mainly affect the deformation and failure loca-tion of the tunnel cross-section surrounding rocks,while the Y,Z-direction joints affect the deformation distri-bution laws of the tunnel axis direction,and the larger the joint dip angle,the deeper the surrounding rocks loosening ranges.关键词
隧道工程/节理岩体/离散元模拟/围岩变形破坏/大跨隧道Key words
tunnel engineering/jointed rock mass/discrete element simulation/deformation and failure of surrounding rock/long-span tunnel分类
交通工程引用本文复制引用
田皓天,俞缙,林聪波,王海猛,蔡浩慧,周玮..节理岩体中大跨隧道围岩变形破坏模式分析[J].华侨大学学报（自然科学版）,2025,46(1):30-37,8.基金项目
国家自然科学基金面上资助项目(52374090) （52374090）
