三峡库区大跨径悬索桥猫道线形调整方法研究  

Study on the Adjustment Method of Catwalk Alignment of Long-span Suspension Bridge in the Three Gorges Reservoir Area

作　　者：谭健 Tan Jian(Chongqing Architectural Design Institute Co.,Ltd.,Chongqing,China)

机构地区：[1]重庆市设计院有限公司,重庆

出　　处：《科学技术创新》2023年第15期108-112,共5页Scientific and Technological Innovation

摘　　要：为了加快猫道施工进度的同时确保猫道的安全质量,建立三峡库区浅滩水域悬索桥大跨径猫道施工控制技术,对猫道线形进行调整。本研究对猫道的影响因素进行了有限元分析,得到如下结论:当计算塔高误差对猫道线形的影响时,越靠近塔顶中心线,猫道承重索高程误差值越大,并且误差值和节点离塔中心线的距离线性正相关;猫道升降温时,承重索节点位移沿悬链线的趋势变化。提出基于塔高偏差、温度,对猫道的线形变化下理论推导公式,利用测量数据计算出调整量,借助千斤顶使每根猫道承重索朝需要调整的方向进行一次整体收紧。In order to speed up the construction progress of catwalk and ensure the safety and quality of catwalk,the construction control technology for long-span catwalk of suspension bridge in the shoal area of the Three Gorges Reservoir Area is established,and the catwalk alignment is adjusted.This research conducts finite element analysis on the influencing factors of catwalks.The following conclusion is drawn:when calculating the impact of tower height error on the catwalk alignment,the closer the tower top centerline is,the greater the elevation error value of the catwalk load-bearing cable,and the error value is linearly positively correlated with the distance between the node and the tower centerline.When the catwalk temperature rises or falls,the displacement of the load-bearing cable node changes along the trend of the catenary.Propose a theoretical derivation formula based on tower height deviation and temperature for the linear change of the catwalk,use measurement data to calculate the adjustment amount,and use a jack to tighten each catwalk load-bearing cable in the direction that needs to be adjusted.

关 键 词：猫道 线形调整 测量 有限元 误差 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]