市政技术2024，Vol.42Issue(7)：161-166,174,7.DOI:10.19922/j.1009-7767.2024.07.161
跨铁路独塔斜拉桥索塔平转施工技术与监测研究
Research of Horizontal Rotation Construction Technology and Monitoring of Single-tower Cable-stayed Bridge Tower across Railway
摘要
Abstract
A cable-stayed railway bridge has pylons of 85 m,inward inclination of 81.22 ° for the left and right piers.The construction method employed is the combination of formwork construction with planar rotation,which has a counterclockwise rotation of 93 ° and the rotation weight of approximately 18 500 tons.In order to address safety concerns the horizontal rotation during construction because of large weight and high gravity of the pylon,a technical analysis and on-site testing were conducted to obtain the key technical points of weighing,counter weighting,attitude monitoring and adjustment.The main conclusions include:that balancing symmetric counter-weights of 50 tonnes along the lower crossbeams and segment 0 beams can reduce the center of gravity;The rotation process is sensitive to unbalanced torque and eccentricity so that pylon weighing and counter weighting errors should be strictly controlled;Before the attitude adjustment,the counterweights are moved out and the pylon's attitude is locked by temporary supports.The verticality should keep consistent before and after rotation.关键词
独塔斜拉桥/索塔/平面转体法/称重试验/姿态监测Key words
single-tower cable-stayed bridge/tower/planar rotation method/weighting test/attitude monitoring分类
交通工程引用本文复制引用
郝磊磊,刘书宏,余雪平,褚少康,程高..跨铁路独塔斜拉桥索塔平转施工技术与监测研究[J].市政技术,2024,42(7):161-166,174,7.基金项目
陕西省秦创原交通基础设施融合与智能建造"科学家+工程师"队伍建设项目(2022KXJ-036) （2022KXJ-036）
甘肃省重点研发计划-工业类项目(22YF11GA304) （22YF11GA304）
