双塔无背索斜拉桥施工技术方案比选  

Comparison and Selection of Construction Technology Schemes for Double Tower Cable-Stayed Bridges Without Back Cables

作　　者：周跃 张百泉 蔡铁臣 ZHOU Yue;ZHANG Baiquan;CAI Tiechen(Shaanxi Provincial Transportation Planning and Design Research Institute Co.Ltd,Xi’an 710000,China;Northwest Branch of China Construction Eighth Engineering Bureau Co.Ltd.,Xi’an 710000,China)

机构地区：[1]陕西省交通规划设计研究院有限公司,陕西西安710000 [2]中国建筑第八工程局西北分公司,陕西西安710000

出　　处：《天津建设科技》2024年第4期40-44,共5页Tianjin Construction Science and Technology

摘　　要：以渭河大桥为工程背景,结合主桥钢斜塔施工环境和结构特点,对主塔施工方案进行论证分析。主塔划分为23个节段,采用分段吊装的方案快速进行主塔施工,通过对不同施工方案进行有限元模拟分析,得到悬臂拼装、支架法拼装及同步安装部分斜拉索方案关键施工工序下的塔根部应力及塔的最大变形,发现同步张拉索方案主塔根部应力和顶部变形均比无支架法大幅度降低,与支架法方案相比除Y向变形外其余方向变形减小。Taking the Weihe River Bridge as the engineering background,and combines the construction environment and structural characteristics of the steel inclined tower of the main bridge to demonstrate and analyze the con⁃struction plan of the main tower.The main tower is divided into twenty-three sections,and the construction of the main tower is carried out quickly using a segmented lifting scheme.Through finite element simulation anal⁃ysis of different construction schemes,the stress at the tower root and the maximum deformation of the tower under the key construction processes of the cantilever assembly,bracket assembly,and synchronous installa⁃tion of partial cable-stayed cable schemesare obtained.It is found that the stress at the root and deformation at the top of the main tower in the synchronous tension cable scheme are significantly reduced compared to the non support method,and compared to the support method scheme,the deformation in all directions except for the Y direction is reduced.

关 键 词：无背索斜拉桥 钢主塔 悬臂拼装 支架法拼装 同步安装 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]