摘要
整孔吊装钢主梁是实现中小跨径钢板组合梁桥工厂化、装配化和快速建造的关键技术。已安装跨钢主梁受力变形导致悬臂端偏离竖直拼接面,会影响钢主梁精准拼接和高效施工。以新平河特大桥为例,建立钢主梁挠度理论计算模型,结合ABAQUS数值模拟和现场挠度监测对悬臂位移变形量准确预测,为悬臂拼接提供可靠的数据支持,并给出中小跨径超宽钢板组合梁桥整孔吊装的详细施工方法。结果表明:简化的力学计算模型具有较好的适用性,理论计算挠度值与数值分析结果、现场监测值相吻合;钢主梁悬臂端位移变形量理论计算值和数值计算值分别为88.58 mm和91.87 mm;钢主梁前后起吊点初始高度差以200 mm为宜。新平河特大桥是国内山区首次采用整孔吊装的多主梁钢板组合梁连续桥,可为类似工程实践提供参考。
The whole-hole hoisting steel main beam is the key technology to realize the factoryization,assembly and rapid construction of medium and small-span steel plate composite beam bridges.The force deformation of the installed span steel main beam causes the cantilever end to deviate from the vertical splicing plane,which will affect the precise splicing and effcient construction of the steel main beam.In this paper,taking the Xinpinghe Bridge as an example,at heoretical calculation method for the deflection of the steel main beam is established,combined with ABAQUS numerical simulation and on-site deflection monitoring to accurately predict the displacement and deformation of the cantilever,which provides reliable data support for cantilever splicing.The detailed construction method of the whole hole hoisting of the wide steel plate composite girder bridge.The results show that the simplified mechanical calculation model has good applicability,and the theoretical calculation deflection value is consistent with the numerical analysis results and field monitoring values;the theoretical and numerical calculation values of the displacement and deformation at the cantilever end and the steel main beam are 88.58 mm and 91.87 mm;the initial height difference between the front and rear lifting points of the steel main beam should be 200 mm.The Xinpinghe Bridge is the first multi-girder steel plate composite girder continuous bridge hoisted by the whole hole in the mountainous area in China,which provides a reference for similar projects.
作者
韩洪举
贾健
郭吉平
陶铁军
胡嫚
赵疆
巨泽港
吴飞
HAN Hongju;JIA Jian;GUO Jiping;TAO Tiejun;HU Man;ZHAO Jiang;JU Zegang;WU Fei(Guizhou Road&Bridge Group Co.,Ltd.,Guiyang,Guizhou 550001,China;College of Civil Engineering,Guizhou University,Guiyang,Guizhou 550025,China;College of Engineering and Technology,Southwest University,Chongqing 400715,China;College of Mechanical and vehicle Engineering,Chongqing University,Chongqing 400044,China)
出处
《公路工程》
2023年第5期52-59,共8页
Highway Engineering
基金
贵州省科技厅科技支撑计划项目(黔科合支撑[2021]一般341)。
关键词
钢板组合梁
中小跨径
整孔吊装
智能架桥机
数值模拟
steel plate composite beam
medium and small span
whole hole hoisting
intelligent bridge erection machine
numerical simulation
