铁道标准设计2026，Vol.70Issue(6)：145-153,208,10.DOI:10.13238/j.issn.1004-2954.202501200002
考虑渗流影响与中间主应力效应的深埋圆形盾构隧道弹塑性统一解
Unified Elastoplastic Solution for Deep-Buried Circular Shield Tunnel Considering Influence of Seepage and Intermediate Principal Stress
摘要
Abstract
[Objective]The influences of seepage and stress fields on the deformation of the surrounding rock and the structural stress of shield tunnels are significant under water-rich geological conditions.[Methods]Based on seepage field theory and elastoplastic mechanics,combined with the unified strength theory and the non-associated flow rule,this study derived an elastoplastic unified solution for circular shield tunnels considering seepage effects and the intermediate principal stress effect.The characteristic curve method was employed to analyze the stability between the surrounding rock and the lining structure.After verifying the accuracy of the proposed mechanical model,this study further investigated the influence patterns of far-field steady seepage pressure,permeability coefficients of the surrounding rock and lining,intermediate principal stress,initial geostress,and support reaction on the plastic zone radius and radial displacement of the tunnel wall.[Results]The results indicated that:the existence of a seepage field expanded the plastic zone range of the surrounding rock and increased the radial displacement of the tunnel wall;the plastic zone radius and the radial displacement approximately increased linearly with increasing far-field steady seepage pressure,decreased nonlinearly with increasing permeability coefficient of the surrounding rock and support reaction,increased nonlinearly in an approximately exponential manner with increasing lining permeability coefficient and initial geostress,and decreased nonlinearly in an approximately exponential manner with increasing unified strength theory parameter b.[Conclusion]These findings provide references for tunnel construction and structural design in water-rich regions.关键词
盾构隧道/深埋隧道/弹塑性解/统一强度理论/渗流场Key words
shield tunnel/deep-buried tunnel/elastoplastic solution/unified strength theory/seepage field分类
交通工程引用本文复制引用
李倩倩,刘魁刚,王新,姜瑞军,黄金坤,杨峥..考虑渗流影响与中间主应力效应的深埋圆形盾构隧道弹塑性统一解[J].铁道标准设计,2026,70(6):145-153,208,10.基金项目
北京市科技计划项目(Z241100009124011) （Z241100009124011）
北京市轨道交通建设管理有限公司双创基金项目(SCJJ2023007) （SCJJ2023007）
中国十七冶集团有限公司科研项目(C24L00040) （C24L00040）
太原轨道交通一号线建设运营有限公司科技项目(C24L03220) （C24L03220）
