现浇分段长度对转体法施工连续梁桥受力影响研究  

Study on the Influence of Cast-in-place Segment Length on the Force of Continuous Beam Bridge Constructed by Rotation Method

作　　者：全文义 QUAN Wen-yi(Xinjiang Xingya Engineering Construction Co.,Ltd.,Urumqi 831100,China)

机构地区：[1]新疆兴亚工程建设有限公司

出　　处：《北方交通》2019年第12期30-33,共4页Northern Communications

摘　　要：为研究分段长度对转体法施工连续梁桥受力的影响,以实际工程为研究背景,通过运用有限元软件模拟转体段施工过程,针对不同分段方案施工的转体段受力变化规律展开对比分析,研究表明:桥梁应力与转体法施工分段长度没有直接关系;分段施工对转体段墩顶中心处的累计水平位移和竖向沉降影响较小,对悬臂端的影响较大;分段越多,悬臂端的累计水平位移越小,悬臂端与墩顶中心的水平位移差值越小;分段越多,转体段悬臂端下挠位移越大,在实际工程中转体段施工应根据分段浇注数量合理设置预拱度,以防止转体段悬臂端出现较大下挠。in order to study the influence of segmented length on the force of continuous beam bridge constructed by rotation method,this paper takes the actual engineering as the research background,simulates the construction process of rotating section by using finite element software,and makes a comparative analysis on the stress variation law of rotating section constructed by different subsection schemes.The research shows that the stress of bridge is not directly related to the length of rotating section construction.The piecewise construction has little effect on the cumulative horizontal displacement and vertical settlement at the center of the pier top of the rotating section,but has a great influence on the cantilever end;the more the segment,the smaller the cumulative horizontal displacement at the cantilever end and the smaller the horizontal displacement difference between the cantilever end and the pier top center;the more the segment,the larger the deflection displacement of the cantilever end of the rotating section is,the better the pre-arch degree should be set according to the quantity of sublevel pouring in the construction of rotating section in order to prevent the large deflection at the cantilever end of the rotating section.

关 键 词：连续梁桥 转体法 现浇分段 受力影响 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]