摘要
京沪高铁北京特大桥跨廊坊市广阳道,设计为系杆叠拱结构。该结构临近既有京沪铁路,拱肋安装危险性大。传统的碗扣架存在横向稳定性差、占用空间大等缺点,因此在施工前期制定方案时拱肋支架采用螺旋焊管,大大节约了桥面空间,并通过纵向连接提高了整体性。重点介绍了拱肋支架搭设、拱脚施工、拱肋安装横撑及K形撑安装、拱肋混凝土压注、系杆的安装与张拉等施工工艺以及焊接方案,取得了良好的效果。
The Beijing Bridge of Beijing-Shanghai Express Railway spanning Guangyang Road of Langfang was designed as simply-supported tied overlapping arch structure.This structure is close the existing Beijing-Shanghai Railway,which imposed danger to the arch rib installation.Traditional cup-lock scaffold has the shortcomings of having poor transverse stability and occupying large space.Therefore,in the early phase of the construction,spirally-welded pipes were used as arch rib supports to save space,and integrity was improved by longitudinal connections.The construction technologies of setting arch rib supports,constructing the arch foot,installing transverse supports and K-shaped supports for the arch rib,pouring the arch rib concrete,installation and tensioning of tie bars,etc.are introduced in detail,The welding schemes are introduced as well,The proposed construction method achieved good effects.
出处
《施工技术》
CAS
北大核心
2013年第2期79-82,共4页
Construction Technology
基金
中国铁建股份有限公司科技研发项目(09-17C)
关键词
桥梁工程
铁路
简支系杆
叠拱
拱肋
安装
bridges
railways
simply-supported tie bar
overlapping arch
arch rib
installation
