隧道分期围堰法施工对邻近桥梁的影响  

Influence of Staged Cofferdam Construction of Tunnel on Adjacent Bridge

作　　者：张宇奇 邱运军 王洋 杨楠 ZHANG Yuqi;QIU Yunjun;WANG Yang;YANG Nan(China Construction Engineering Industrial Technology Research Institute Co.,Ltd.,Beijing100161,China;China Construction Infrastructure Co.,Ltd.,Beijing101300,China;Beijing Tongzhou District Housing and Urban-Rural Development Commission,Beijing101300,China)

机构地区：[1]中国建设基础设施有限公司,北京100161 [2]中建工程产业技术研究院有限公司,北京101300 [3]北京市通州区住房和城乡建设委员会,北京101300

出　　处：《施工技术（中英文）》2024年第22期65-70,共6页Construction Technology

基　　金：中建基础科技研发课题(CSCIC-2020-KT-04)。

摘　　要：为研究隧道分期围堰法施工对邻近桥梁的影响,结合工程实际,采用有限元法对河道、桥梁、围堰、围护结构、主体结构等进行建模,采用单元生死方法对隧道施工进行模拟,并结合监控量测进行深化研究,总结了不同位置桥梁承台在不同施工工况下的位移规律。通过将是否对隧道周围土体进行加固作为变量开展桥梁承台的位移对比分析,证明了土体三轴水泥土搅拌桩加固对隧道分期围堰法施工时邻近既有桥梁的保护效果良好。In order to study the influence of tunnel stage cofferdam construction on adjacent bridges,combined with engineering practice,the finite element method is used to model the river channel,bridge,cofferdam,retaining structure and main structure.The element birth and death method is used to simulate the tunnel construction,and the monitoring measurement is used to deepen the research.The displacement law of bridge caps at different positions under different construction conditions is summarized.By taking the reinforcement of the soil around the tunnel as a variable to carry out the displacement comparative analysis of the bridge cap,it is proved that the soil triaxial cement-soil mixing pile reinforcement has a good protection effect on the adjacent existing bridge during the construction of the tunnel cofferdam method.

关 键 词：隧道 分期围堰法 数值模拟 监测 

分 类 号：TU753[建筑科学—建筑技术科学]