基于受力优化的独塔斜拉桥换索施工关键技术  

Key Construction Technology of Cable Replacement of Cable-stayed Bridge with Single Tower Based on Optimization of Structural Force

作　　者：刘海宽 张会礼 LIU Haikuan;ZHANG Huili(College of Civil Engineering,Zhengzhou University,Zhengzhou,Henan 450001,China;Henan Transportation Research Institute Co.,Ltd.,Zhengzhou,Henan 450015,China;Henan Zhenxiang Road&Bridge Technology Co.,Ltd.,Zhengzhou,Henan 450046,China)

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]河南省交通科学技术研究院有限公司,河南郑州450015 [3]河南省祯祥路桥科技有限公司,河南郑州450046

出　　处：《施工技术（中英文）》2022年第18期25-28,共4页Construction Technology

基　　金：河南省重大科技专项(151100310900)。

摘　　要：为改善斜拉桥结构的受力状态,探讨斜拉索更换关键施工技术,以某独塔斜拉桥换索工程为背景,通过有限元计算对新索索力进行了优化,实现了结构受力状态调整;结合旧索拆卸和新索安装工艺,模拟了换索施工过程,验证了施工方案的合理性;结合施工条件,介绍了换索施工中旧索拆除和新索安装关键技术。荷载试验结果显示,换索加固完成后桥梁整体刚度增大,承载力有所提高。In order to improve the stress state of the cable-stayed bridge and discuss the key construction technology of cable replacement, taking a single-tower cable-stayed bridge as engineering background, the new cable force was optimized through finite element calculation, and the structural stress state was adjusted. Combined with the old cable removal and new cable installation technology, the construction process of the cable replacement was simulated, and the rationality of the construction plan was verified;combined with the construction conditions, the key technologies of the old cable removal and the new cable installation in the cable replacement construction were introduced. The load test results show that the overall stiffness of the bridge increases after the cable replacement is completed, and the bearing capacity is improved.

关 键 词：桥梁工程 斜拉桥 换索 受力状态 荷载试验 施工技术 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U445.4[交通运输工程—道路与铁道工程]