顶推与体外转体法桥梁施工过程中临时墩球铰多向受力分析  

Multi-directional Force Analysis of Spherical Hinge of Temporary Pier during Bridge Construction with Incremental Launching and Extracorporeal Rotation Method

作　　者：李振兵 Li Zhenbing(China Railway 9th Bureau Group 7th Engineering Co.,Ltd.,Shenyang 110100,China)

机构地区：[1]中铁九局集团第七工程有限公司,沈阳市110100

出　　处：《北方交通》2024年第6期1-4,9,共5页Northern Communications

基　　金：沈阳市科技计划项目基金(23-407-3-19)。

摘　　要：随着我国桥梁建设快速发展,在跨越形式及施工方法上,桥梁设计和施工愈加科学化和多样化。虽然顶推法和转体法在国内外已经得到广泛应用,但两种方法的联合应用却鲜有实例。采用临时墩作为顶推、转体支撑墩时,临时墩下部球铰受力十分复杂,顶推偏载、风荷载等不确定因素均可能导致球铰发生偏移,进而影响正常转体。因此,文章以沈阳市揽军路转体桥工程为研究案例,基于一种将顶推法、转体法结合使用的新型施工方法,详细分析施工过程中临时墩下部球铰的受力情况,确保转体时球铰正常使用。With the rapid development of bridge construction in China,the design and construction of bridges have become more scientific and diversified in terms of spanning forms and construction methods.Although the incremental launching method and the rotation method have been widely used at home and abroad,there are few examples of the joint application of the two methods.When the temporary pier is used as the support pier of incremental launching or rotation,the force of the spherical hinge at the lower part of the temporary pier is very complex,and the uncertain factors such as eccentric load of incremental launching,wind load and so on may cause the excursion of the spherical hinge,and then affect the normal rotation.Therefore,taking the rotary bridge project of Lanjun road in Shenyang as the research case,the force of the spherical hinge at the lower part of the temporary pier during the construction is analyzed in detail based on a kind of new construction method that combines the incremental launching method and the rotation method,so as to ensure the normal use of the spherical hinge when rotating.

关 键 词：顶推转体 临时支墩体外转体 钢箱梁 体系转换 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]