摘要
为解决跨运营高速铁路连续刚构桥转体施工稳定性和安全性问题,以新建福州至厦门铁路西溪特大桥为研究对象,在分析新建高速铁路连续刚构桥与既有铁路线关系的基础上,提出“支架现浇+转体施工”的施工方案,并采用现场实测法研究转动称重关键参数。针对转体施工总体工艺,提出转动体系施工控制措施、转动平衡控制措施、转动牵引力及制动距离控制措施。研究结果表明,转动过程的平顺性验证了转动称重关键参数的准确性;在正常匀速转动阶段,梁体转动角速度变化平稳,平均转动角速度为1.12°/min,墩柱沿纵桥向和横桥向的姿态稳定;转动完成后轴线最大偏差为3.5mm,满足规范限值要求。
In order to solve the stability and safety issues of the rotating construction of the continuous rigid frame bridge across high-speed railways,the newly built Xixi Extra Large Bridge of Fuzhou to Xiamen Railway is taken as the research object.Based on the analysis of the relationship between the newly built bridge and the existing railway line,a construction plan of bracket cast-in-place+rotating construction is proposed,and the key parameters of rotating weighing are studied using in-site measurement method.Regarding the overall process of rotational construction,the control measures for rotational system construction,rotational balance control measures,rotational traction force and braking distance control measures are proposed.The research results indicate that the smoothness of the rotation process verifies the accuracy of the key parameters of rotational weighing.During the normal uniform rotation stage,the rotational angular velocity of the beam changes steadily,with an average rotational angular velocity of 1.12°/min.The posture of the piers and columns along the longitudinal and transverse bridge directions is stable.The maximum deviation of the axis after rotation is 3.5mm,which meets the regulatory limit requirements.
作者
陈亮
CHEN Liang(The Fifth Construction Co.,Ltd.of China Tiesiju Civil Engineering Group,Jiujiang,Jiangxi332000,China)
出处
《施工技术（中英文）》
CAS
2024年第3期117-122,共6页
Construction Technology
基金
中铁四局集团有限公司科技研发项目(2022-30)。
关键词
高速铁路
刚构桥
转体
支架
监测
施工技术
high-speed railways
rigid frame bridges
rotation
supports
monitoring
construction
