铁道标准设计2025，Vol.69Issue(4)：110-118,9.DOI:10.13238/j.issn.1004-2954.202306150005
基于环向变形测量的盾构隧道结构内力反演分析
Inversion Analysis of Internal Forces in Shield Tunnel Structure Based on Circumferential Deformation Measurements
摘要
Abstract
During shield tunneling through uneven strata,the geological conditions are complex,the structure is subjected to large forces,and its overall stiffness is low,resulting in weak deformation resistance.Therefore,it is necessary to monitor the deformation and stress conditions of the shield tunnel to ensure the safety of the tunnel structure and operation.However,traditional monitoring methods cannot effectively monitor areas with significant structural deformation or achieve long-term health monitoring.To investigate long-term monitoring methods for structural deformation and stress of shield tunnel,this study,based on the Jiangyin-Jingjiang Yangtze River Tunnel construction project,set up monitoring points at the same cross-section as structural health monitoring.An internal force inversion analysis software of shield tunnel structure based on precision measurement was independently developed to perform internal force inversion on the field measured data,and internal force was estimated in conjunction with health monitoring data.The bending moment values calculated by the two monitoring methods were obtained.A comparative analysis was conducted on these two sets of bending moment values,and a precision measurement method for shield tunnel based on ATS laser tracking technology was proposed.The results showed that the precision measurement method was able to monitor any cross-section at any time,enabling long-term monitoring of the most critical and high-risk parts throughout the tunnel's life cycle,with an accuracy of 0.01 mm.The spatial distribution of precision measurement data aligned with structural health monitoring data,and the bending moment values were relatively close.The ratios of the maximum tensile stress to the maximum compressive stress were 96％and 90％,respectively,validating the precision,accuracy,and reliability of the measured data.This study provides a new method for long-term monitoring of shield tunnel in the future,allowing for a more precise understanding and evaluation of the structural health of the tunnel.关键词
盾构隧道/健康监测/精密测量/内力反演/ATS激光跟踪技术Key words
shield tunnel/health monitoring/precision measurement/internal force inversion/ATS laser tracking technology分类
交通工程引用本文复制引用
肖明清,薛光桥,张忆,王帅鹏,吴鑫林,陈稳..基于环向变形测量的盾构隧道结构内力反演分析[J].铁道标准设计,2025,69(4):110-118,9.基金项目
国家自然科学基金项目(52278409) （52278409）
