摘要
为了解决因转体球铰支点两端梁体质量偏差极大,采用完全配重仍不能使转体达到平衡状态的转体施工难题,通过在质量大的一侧梁底设置辅助前支撑和质量小的梁端配重,在配重及辅助前支撑的共同作用下使转体达到平衡状态;因辅助前支撑的摩擦力将以半径相应的倍数反映在转体转盘处,导致转体牵引力会比较大、转体困难,提出了在辅助前支撑处设置齿轮齿条电机的新型转体驱动方式解决中心球铰牵引力过大的问题;通过建立转体桥的计算模型,模拟转体系统和梁体在转体各阶段的受力理论数据。经实践证明,该转体系统性能稳定,能够实现安全的不平衡梁段转体施工。
In order to solve the problem of rotation construction that the mass difference of the beam at both ends of the swivel spherical hinge fulcrum is extremely big,and the full counterweight still cannot make the rotating body reach a balanced state,an auxiliary front support and a light beam end counterweight were installed at the bottom of the beam on the side with large mass to help the rotating body maintain balance under the combined action.Because the frictional force of the auxiliary front support will be reflected on the turntable at the corresponding multiple of the radius,the traction of the rotating body will be relatively large,and the rotation will be difficult,a new type of rotating drive method with a rack and pinion motor installed at the auxiliary front support was proposed to solve the problem of excessive traction of the central spherical hinge.Through the establishment of the calculation model of the rotating bridge,the theoretical data of the rotation system and beams in each stage of the rotating body were simulated.Practice has proved that the performance of the rotation system is stable and can realize the safe rotation construction of unbalanced beams.
作者
郭昭赢
GUO Zhao-ying(2nd Engineering Co.,Ltd.of China Railway 11th Bureau Group,Shiyan 442013,Hubei,China)
出处
《筑路机械与施工机械化》
2020年第10期40-44,共5页
Road Machinery & Construction Mechanization
关键词
桥梁工程
转体施工
不对称梁段
有限元分析
bridge engineering
rotation construction
asymmetric beam
finite element analysis
