中南大学学报（自然科学版）2026，Vol.57Issue(2)：679-693,15.DOI:10.11817/j.issn.1672-7207.2026.02.016
考虑Hoek-Brown准则和孔压效应的盾构隧道掌子面支护力上限分析
Upper limit analysis of support force at palm face of shield tunnel considering Hoek-Brown criterion and pore pressure effect
摘要
Abstract
The stability of the tunnel face is crucial during shield tunnel excavation,and accurate analysis of the shield support force can reduce the risk of collapse and instability ahead of the tunnel face.Based on the intact and truncated double-logarithmic spiral failure modes of the tunnel face under different burial depth conditions,an upper limit solution for the required tunnel face support force in water-rich fractured surrounding rock was derived using limit analysis theory,with consideration of the nonlinear Hoek-Brown failure criterion and pore water pressure effects.An engineering case study was used to explore the failure characteristics of the tunnel face at different burial depths and tunnel diameter ratios(H/d),and the influence of the nonlinear Hoek-Brown criterion parameters and pore water pressure on tunnel face stability was analyzed.The results show that with the increase of the tunnel burial depth,the failure mode of the tunnel face progressively shifts from the truncated double-logarithmic spiral failure mode to the intact double-logarithmic spiral failure mode.The critical value for this transition between the two failure modes is H/d=2.0.The support force decreases with the increase of the nonlinear Hoek-Brown criterion parameters(mi and GSI),while it approximately increases linearly with the pore water pressure coefficient.When the tunnel depth is large,the influence of pore water pressure on the required support force becomes more pronounced.The findings of this study can provide valuable references for the design of soil chamber pressure and stability evaluation of the tunnel face during shield tunneling in water-rich fractured rock masses.关键词
盾构隧道/掌子面稳定性/双对数螺旋线破坏模式/非线性Hoek-Brown破坏准则/极限分析/孔隙水压Key words
shield tunnel/stability of the tunnel surface/double-logarithmic spiral failure mode/nonlinear Hoek-Brown failure criterion/limit analysis/pore water pressure分类
交通工程引用本文复制引用
傅鹤林,曹桂乾,任世玉,胡凯巽,赵一博..考虑Hoek-Brown准则和孔压效应的盾构隧道掌子面支护力上限分析[J].中南大学学报（自然科学版）,2026,57(2):679-693,15.基金项目
国家自然科学基金资助项目(52478424)(Project(52478424)supported by the National Natural Science Foundation of China) （52478424）
