大跨度复杂竖曲线钢梁顶推控制关键技术  

Key Technology of Jacking Control for Large‑Span Complex Vertical Curve Steel Beam

作　　者：王海南 楚民红 阙水杰 WANG Hainan;CHU Minhong;QUE Shuijie(China Railway Development and Investment Group Co.,Ltd.,Kunming 650599,China;China Railway Bridge&Tunnel Technologies Co.,Ld.,Nanjing 210061,China)

机构地区：[1]中铁开发投资集团有限公司,云南昆明650599 [2]中铁桥隧技术有限公司,江苏南京210061

出　　处：《测试技术学报》2024年第3期230-239,共10页Journal of Test and Measurement Technology

摘　　要：以柳州凤凰岭大桥为背景,其具有顶推跨径大、钢梁线形复杂等特点,介绍了凤凰岭大桥钢梁顶推过程中的关键技术,包括顶推控制、钢梁预拼和桥位拼装、顶推过程扣锚索调整、顶推到位整体落梁等方面;钢梁顶推过程中通过调整各支点的相对高程和扣锚索索力来控制各支墩支反力、钢梁导梁结构应力等参数,采用“隔墩交替落梁”的方法,平稳地将钢梁从顶推支撑线高度落至设计标高。柳州凤凰岭大桥较好地完成了钢梁顶推控制,对同类桥梁施工有很好的借鉴意义。Taking the Fenghuangling Bridge in Liuzhou as the background,with the characteristics of large top pushing span and complex steel beam curves,this paper introduces the key technologies in the steel beam top pushing process of Fenghuangling Bridge,including top pushing control,preassembly of steel beams and bridge position assembly,adjustment of anchor cables during top pushing process,and overall drop of beams in place during top pushing.During the process of pushing the steel beam,the rela-tive elevation of each support point and the tension of the anchor cable are adjusted to control the param-eters such as the reaction force of each support pier and the structural stress of the steel beam guide beam.The method of“alternating dropping the beam from the pier to the top support line”is adopted to smoothly lower the steel beam from the height of the pushing support line to the design elevation.The Fenghuangling Bridge in Liuzhou has achieved good control of steel beam launching,which has great refer-ence significance for the construction of similar bridges.

关 键 词：钢梁顶推 导梁上墩 支撑反力 索力调整 整体落梁 

分 类 号：U448.215[建筑科学—桥梁与隧道工程] U445.462[交通运输工程—道路与铁道工程]