基于实测位移的水下大直径盾构隧道外荷载反演研究  

Research on External Load Inversion of Underwater Large-Diameter Shield Tunnel Based on Measured Displacement

作　　者：陈稳 鲁志鹏[2] 吴鑫林 郭志华 CHEN Wen;LU Zhipeng;WU Xinlin;GUO Zhihua(Jiangsu Construction Bureau of Transportation Engineering,Nanjing 210004,China;China Railway Siyuan Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China;Shanghai Tongyan Civil Engineering Technology Co.,Ltd.,Shanghai 200092,China;Shanghai Engineering Research Center of Detecting Equipment for Underground Infrastructure,Shanghai 200092,China)

机构地区：[1]江苏省交通工程建设局,江苏南京210004 [2]中铁第四勘察设计院集团有限公司,湖北武汉430063 [3]上海同岩土木工程科技股份有限公司,上海200092 [4]上海地下基础设施安全检测与养护装备工程技术研究中心,上海200092

出　　处：《河南科技》2024年第7期75-80,共6页Henan Science and Technology

摘　　要：【目的】为了实现水下盾构隧道整断面结构力学状态的长久监测。【方法】依托江苏某过江大直径盾构隧道工程,利用ATS激光跟踪的盾构隧道管片变形高精度测量与数据预处理方法,基于变形实测数据,结合遗传算法和阻尼最小二乘法优化方法,对盾构隧道横断面外部荷载状况进行反演,并与监测结果进行对比分析。【结果】工程应用表明:通过遗传算法与阻尼最小二乘法所反演的外部荷载数值均介于现场实测与太沙基理论之间。与两者相比,水平荷载最小误差为1%,最大误差为13.54%,平均误差为5.98%;顶部竖向荷载最小误差为6.11%,最大误差为13.2%,平均误差为10.47%。【结论】基于现场实测位移数据,反演水下盾构隧道任意断面、任意时间段的外部荷载状况的技术路线是可行的,为隧道外荷载状态及时监测提供了一种新途径。[Purposes]This paper aims to reflect the structural mechanics state of the whole section of underwater shield tunnel permanently and accurately.[Methods]Based on a large-diameter shield tunnel project across the river in Jiangsu Province,the high-precision measurement and data preprocessing method of shield tunnel segment deformation based on ATS laser tracking is used.Based on the measured deformation data and combined with genetic algorithm and damping least squares optimization method,the external load condition of shield tunnel cross section is inverted,and the results were compared with the monitoring results.[Findings]Engineering applications show that:The external loads inverted by genetic algorithm and damped least square method are between the field measurement and Terzaghi theory.Compared with the two,the minimum error of horizontal load is 1%,the maximum error is 13.54%,and the average error is 5.98%.The minimum error of the vertical load at the top is 6.11%,the maximum error is 13.2%,and the average error is 10.47%.[Conclusions]Based on the field measured displacement data,the technical route of inverting the external load condition of underwater shield tunnel at any section and any time period is feasible,which provides a new way for the timely monitoring of the external load condition of the tunnel.

关 键 词：水下盾构隧道 精密测量 遗传算法 阻尼最小二乘法 荷载 

分 类 号：U456.3[建筑科学—桥梁与隧道工程]