华东交通大学学报2026，Vol.43Issue(4)：11-19,9.
不利结构面影响下的隧道围岩坍塌机理研究
Study on the Collapse Mechanism of Tunnel Surrounding Rock Under the Influence of Unfavorable Structural Planes
摘要
Abstract
Currently,the collapse mechanism and failure mode of tunnel surrounding rock considering the influ-ence of unfavorable structural planes in jointed fractured rock mass are not well understood.To investigate the ef-fect of the unfavorable structural planes on the stability of deep-buried tunnel rock mass,failure mechanisms of the rock mass with unfavorable structural planes existing at roof and spandrel of the tunnel are constructed by us-ing the spatial discretization technique.Based on the Hoek-Brown failure criterion and the upper bound theorem of limit analysis,the objective function of the rock mass safety factor with the consideration of unfavorable struc-tural planes is derived.The upper bound solution of the rock mass safety factor and the collapse range under the limit state are obtained through optimization calculation.Taking Hushan Tunnel as engineering background,a nu-merical model of the rock mass with unfavorable structural planes is constructed and numerical results of the rock mass safety factor and the collapse range of the rock mass are obtained.By comparing the theoretical results with the numerical results,the validity of the theoretical method proposed in this paper is verified.Parameter analysis indicates that the safety factor of the rock mass with unfavorable structural planes at roof and spandrel increases with the increase of geological strength index GSI and rock material constant mi.The collapse range of rock mass increases with the increase of GSI while it decreases with the increase of mi.关键词
围岩稳定性/Hoek-Brown破坏准则/不利结构面/空间离散技术/上限定理Key words
rock mass stability/Hoek-Brown failure criterion/unfavorable structural planes/spatial discretiza-tion technique/upper bound theorem分类
交通工程引用本文复制引用
黄阜,谭鑫,张敏,陈璐,凌同华..不利结构面影响下的隧道围岩坍塌机理研究[J].华东交通大学学报,2026,43(4):11-19,9.基金项目
国家自然科学基金项目(52278395) （52278395）
