西南交通大学学报2025，Vol.60Issue(5)：1106-1120,15.DOI:10.3969/j.issn.0258-2724.20230442
围岩蠕变作用下隧道支护结构的劣化特征
Deterioration Characteristics of Tunnel Support Structures under Surrounding Rock Creep
摘要
Abstract
To investigate the long-term deterioration characteristics of tunnel support structures under creep effect,mechanical models of anchor bolt fracture,steel arch frame yielding,and concrete plastic damage were established for the tunnel support structure system.Numerical examples were used to verify the validity of the mechanical models for support structure deterioration.The deterioration characteristics of anchor bolt fracture,steel arch frame yielding,and lining damage were explored under conditions dominated by vertical stress,hydrostatic pressure,and horizontal stress.The results show that the fracture first occurs at the anchor bolt at mid-height of the tunnel sidewall and then develops circumferentially towards both sides.The axial force of the steel arch frame first increases rapidly,then develops slowly,and finally decreases significantly.The rapid decrease of axial force is accompanied by drastic changes in the bending moment,with some measuring points appearing a change of bending moment from negative to positive.The compressive damage zones are mainly distributed at the sidewall and wall foot positions of the tunnel,while tensile damage first appears on the surface of the secondary lining at the mid-height of the sidewall.As the lateral pressure coefficient increases,the anchor bolt fracture,the steel arch frame yielding,formation of a continuous compressive damage zone in the lining,and the maximum tensile damage appear earlier.关键词
蠕变/锚杆破断/钢拱架屈服/衬砌损伤/劣化特征Key words
creep/anchor bolt fracture/steel arch frame yielding/lining damage/deterioration characteristic分类
交通工程引用本文复制引用
蓝日彦,杨凯,邱云辉,崔耀中,乔敏杰,晏启祥..围岩蠕变作用下隧道支护结构的劣化特征[J].西南交通大学学报,2025,60(5):1106-1120,15.基金项目
国家自然科学基金项目(U21A20152) （U21A20152）
2020年度交通运输行业重点科技项目(2020-MS3-083) （2020-MS3-083）
广西科技计划项目(桂科AB20238036) 西华大学人才引进项目(Z231016)的资助. （桂科AB20238036）
