摘要
以盐通铁路跨通榆河(110+228+110)m连续梁-拱桥建造为例,为解决控制工期难题,优化连续梁钢管拱设计施工方案,主梁优化为大节段浇筑和悬臂浇筑相结合方案,钢管拱安装通过对原位支架拼装、原位矮支架拼装竖转合拢、原位矮支架拼装竖向提升合拢、异位高支架拼装纵向滑移、异位矮支架拼装纵向滑移竖向提升与原位支架拼装配合大节段浮吊吊装等六种工艺方案进行研究比选,最终采用原位支架拼装配合大节段浮吊吊装工艺,针对性地解决了工期卡控的难题,为类似超大跨度连续梁拱快速施工提供借鉴。
Taking the construction of a continuous beam-arch bridge across the Tongyu River(110+228+110)m on the Yantong Railway as an example,in order to solve the problem of controlling the construction period and optimize the design and construction plan of the continuous beam steel pipe arch,the main girder is optimized as a combination of large section pouring and cantilever pouring.Through the research and comparison of six schemes,such as assembling in-situ supports,in-situ low-supports,vertical turning and closing,in-situ low-supports assembling,vertical lifting and closing,out-of-position high-supports assembling,longitudinal sliding,and out-of-situ low supports,assembling longitudinal sliding and vertical lifting,in-situ support assembly and large-segment floating crane hoisting,the steel pipe arch is finally installed with assembling in-situ supports and large-segment floating crane hoisting,which solves the problem of construction period control in a targeted manner,and provides a reference for the rapid construction of similar super-large-span continuous beam arches.
作者
常青
CHANG Qing(Jiangsu Railway Group Co.Ltd.,Nanjing 210049,China)
出处
《现代交通与冶金材料》
CAS
2021年第6期6-10,共5页
Modern Transportation and Metallurgical Materials
关键词
桥梁施工
超大跨度连续梁拱
大节段浇筑
大节段浮吊吊装
bridge construction
super large-span continuous beam arch
large section pouring
large section floating crane hoisting
