大跨度矮塔斜拉桥施工预埋索导管角度的修正方法  

Correction method for angle of embedded cable ducts during construction of long-span low-pylon cable-stayed bridges

作　　者：孙勇 申奥[2] 李明敏 王志喻 Sun Yong;Shen Ao;Li Mingmin;Wang Zhiyu(School of Architecture&Civil Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;School of Transportation Science&Engineering,Harbin Institute of Technology,Harbin 150040,China;Longjian Road&Bridge Co.Ltd.,Harbin 150040,China)

机构地区：[1]黑龙江科技大学建筑工程学院,哈尔滨150022 [2]哈尔滨工业大学交通科学与工程学院,哈尔滨150040 [3]龙建路桥股份有限公司,哈尔滨150040

出　　处：《黑龙江科技大学学报》2024年第5期717-721,728,共6页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省省属高校基本科研业务费项目(2023-KYYWF-0512)。

摘　　要：为保证成桥后达到设计目标,避免平行钢绞线斜拉索与索导管在桥梁运营期间碰撞摩擦发生损伤导致耐久性病害,以鹤大高速佳木斯松花江特大桥为工程背景,分析了施工期间主梁梁段累计转角、张拉索力等因素对索导管修正角度的影响,基于悬链线方程迭代方法计算并确定了索导管角度的修正值,降低摩擦对索导管的损害。结果表明:影响索导管修正角度的主要因素是斜拉索的长度和截面面积,与张拉索力无关,其中斜拉索截面面积对修正值的影响较大;桥梁成桥时斜拉索状态良好,角度修正方法准确可靠,对施工质量提升具有积极作用。This paper aims to prevent the damage caused by friction between parallel steel strand stay cables and cable guide pipes for achieving the bridge design goals.The study,by taking Heda Expressway Jiamusi Songhua River Bridge as the engineering background,involves analyzing the influence factors of the cumulative rotation of the main girder segments and cable tension during construction on the correction angle of the cable guide pipes,determining the correction values of the correction angle of the cable guide pipes by using an iterative method based on catenary equation,and reducing the friction damage to the cable duct.The results show that the length and cross-sectional area of the stay cables are the key factors influencing the correction angle,and the cross-sectional area having a significant impact,with no correlation with cable tension.The stay cables are in good condition upon bridge completion,confirming the accuracy and reliability of the angle correction method,improving the engineering quantity.

关 键 词：矮塔斜拉桥 索导管 角度修正 梁段转角 斜拉索 

分 类 号：U445[建筑科学—桥梁与隧道工程]