摘要
以436 m的三主桁中承式六跨连续钢桁拱桥明珠湾大桥为研究背景,通过建立全桥有限元模型进行敏感性分析,研究大桥合龙口调节措施的有效性,提出设计一种纵向新型微调装置,以满足合龙口纵向微调,达到大桥"零误差"合龙的条件。计算分析结果与应用效果显示,采用Q370钢材通过不同厚度钢板利用正交熔透焊组合的方法形成整体结构,可以满足250 t顶拉力需要;合龙时通过先粗调至10~15 mm时再采用微调装置调整效果良好,可以满足多点同步合龙的需要,提高了合龙施工效率与经济效益,该微调装置结构设计与使用方法对同类桥梁合龙施工具有借鉴意义,并有望推广。
Taking the 436 m Mingzhu Bay three-main truss mid-supported six-span continuous steel truss arch bridge as the research background,through establishment of full bridge finite element model for sensitivity analysis,the effectiveness of bridge final closure adjustment measures is studied,and a new type of longitudinal new micro-adjustment device is proposed to meet the longitudinal micro adjustment of the closure and achieve the condition of"zero error"closure of the bridge.The calculation result and application effect show that:Q370 steel is used to form an overall structure through orthogonal penetration welding combination of steel plates of different thicknesses,which can meet the needs of 250 t top tension;when the final closure is closed,the adjustment effect is good through rough adjusting to 10~15 mm and then using microadjustment device,it can meet the needs of multi-point synchronous closing and improve the efficiency and economic benefits of the closing construction,the structural design and use method of the micro-adjustment device has reference significance for the closing construction of similar bridges,and is expected to be popularized.
作者
任延龙
REN Yanlong(China Railway Construction Bridge Engineering Bureau Group Southern Engineering Co.Ltd.,Guangzhou Guangdong 511462,China)
出处
《铁道建筑技术》
2021年第7期70-73,共4页
Railway Construction Technology
基金
天津市科技开发计划项目(19YDL ZSF00030)
中国铁建股份有限公司科技研发计划项目(2018-C05)
中国铁建大桥工程局集团有限公司科技研究开发课题(DQJ-2019-B24)。
关键词
桥梁工程
三主桁
钢桁拱桥
中跨合龙
微调装置
敏感性分析
bridge engineering
three main truss
steel truss arch bridge
mid-span closure
micro-adjustment device
sensitivity analysis