某滑移支架汛期横桥向变形监测与分析  

Monitoring and Analysis of Transverse Bridge Deformation of a Sliding Support in Flood Season

作　　者：林照远 LIN Zhaoyuan

机构地区：[1]福建建工集团有限责任公司,福建福州350108

出　　处：《福建建设科技》2023年第3期91-94,共4页Fujian Construction Science & Technology

摘　　要：滑移支架法是钢箱梁安装常用的施工方法,支架承受了钢箱梁较大的竖向荷载,同时承担流水荷载。本文以福建某钢桥滑移支架为例,通过徕卡Ts30超高精度全站仪监测测点坐标,以及Midas建模计算,分析两种不同基础在汛期强大水力作用下的横向变形。分析表明:支架体系在水力作用下发生弹性变形;各测点变形监测数据变化趋势与水位高度变化较为一致,且与模型数据差异较为一致,说明监测数据与模型较为可靠,涡流效应是建模理论值比实测值小的原因;植筋基础立柱更长是变形值更大的主要原因,不同基础刚度几乎没有影响。The sliding support method is a common construction method for the installation of steel box girder.The support bears the large vertical load of the steel box girder and also bears the water load.Taking the sliding support of a steel bridge in Fujian as an example,this paper analyzes the deformation of two different foundations under the strong hydraulic action in flood season through through the coordinates of Leica Ts30 ultra high precision total station monitoring points and Midas modeling calculation.The analysis shows that the support system undergoes elastic deformation under hydraulic action;The change trend of deformation monitoring data at each measuring point is relatively consistent with the change of water level height,and is relatively consistent with the difference of model data,indicating that the monitoring data and the model are relatively reliable,and eddy current effect is the reason why the theoretical value of the modeling is smaller than the measured value.The longer column length of the reinforced foundation is the main reason for the larger deformation value,and different foundation stiffness has almost no effect.

关 键 词：滑移支架 汛期 监测 变形分析 

分 类 号：U446[建筑科学—桥梁与隧道工程]