岩土工程学报2024，Vol.46Issue(10)：2166-2173,8.DOI:10.11779/CJGE20230650
纵向槽钢和轴力共同作用的盾构隧道等效刚度解析解
Analytical solution for equivalent stiffness of shield tunnels under combined action of longitudinal channel steel and axial force
摘要
Abstract
To accurately and quickly predict the effects of longitudinal channel steel reinforcement technology on the equivalent stiffness of a shield tunnel,the theoretical researches are conducted on the longitudinal channel steel reinforcement technology.A new analytical solution is proposed for the equivalent bending stiffness of the shield tunnel under the combined action of longitudinal channel steel and axial force.The solution can be degenerateed into a special case without longitudinal channel steel,and it is validated those the classical theory,model tests and numerical simulation.The results show that the neutral axial φ of the shield tunnel decreases with the increasing longitudinal channel steel and longitudinal axial force,directly affecting the contact state between tunnel segments,which will impact the equivalent stiffness of the shield tunnel.The equivalent stiffness of the shield tunnel increases nonlinearly in an S-curve with the longitudinal axial force and decreases with the increasing bending moment,which is directly proportional to the width of tunnel segment,the number,elastic modulus and sectional area of channel steel.The influential order on the equivalent stiffness of the shield tunnel is the number,sectional area and elastic modulus of longitudinal channel steel.The influence mechanism of sensitivity parameters of longitudinal channel steel on the equivalent stiffness of tunnels is theoretically explained,which enables accurate and quick prediction of the reinforcement effects of longitudinal channel steel.关键词
纵向槽钢/纵向轴力/解析解/盾构隧道/等效刚度Key words
longitudinal channel steel/longitudinal axial force/analytical solution/shield tunnel/equivalent stiffness分类
建筑与水利引用本文复制引用
江学辉,颜建伟,罗文俊,刘天宇,徐长节..纵向槽钢和轴力共同作用的盾构隧道等效刚度解析解[J].岩土工程学报,2024,46(10):2166-2173,8.基金项目
国家杰出青年科学基金项目(52225210) （52225210）
国家自然科学基金项目(51978265) （51978265）
江西省防灾减灾及应急管理重点实验室项目(20212BCD42011) （20212BCD42011）
