组合梁斜拉桥单边吊装中跨合龙技术研究  

Research on the Middle Span Closure Technology for Unilateral Hoisting of Composite Beam Cable-stayed Bridges

作　　者：陈孝诚 杨黎明 曹明明 王克兵 CHEN Xiao-cheng;YANG Li-ming;CAO Ming-ming;WANG Ke-bing(NO.2 Engineering Ltd of FHEC,CCCC,Suzhou 215151,China;Gansu Fifth Ring Road Engineering Co.Ltd.,Lanzhou 730050,China;China Railway Bridge Bureau Seventh Engineering Co.Ltd.,Wuhan 430034,China;China Railway Bridge Science Research Institute Ltd.,Wuhan 430034,China)

机构地区：[1]中交一公局第二工程有限公司,苏州市215151 [2]甘肃五环公路工程有限公司,兰州市730050 [3]中铁大桥局第七工程有限公司,武汉市430034 [4]中铁大桥科学研究院有限公司,武汉市430034

出　　处：《公路》2024年第11期171-176,共6页Highway

摘　　要：浙江甬台温高速公路复线鳌江特大桥主桥为双塔双索面组合梁斜拉桥,跨径布置为52 m+88 m+320 m+88 m+52 m=600 m。原设计采用合龙口两侧的桥面吊机抬吊的方式吊装中跨合龙段。由于桥面吊机空间有限,实际选择采用单边桥面吊机吊装合龙段的方式合龙。为了保证单边吊装中跨合龙状态和原方案合龙口两侧桥面吊机抬吊合龙状态一致,使用有限元分析对合龙前最大悬臂状态的参数敏感性进行了研究,研究结果表明梁段的吊装重量和张拉索力对中跨合龙前最大悬臂状态主梁线形的影响最大。施工中提出了单边吊装施工及控制方案,施工效果良好。The main bridge of the Aojiang Major Bridge on the double track of Zhejiang Ningbo-Taizhou-Wenzhou(Yong-Tai-Wen)Expressway is a composite beam cable-stayed bridge structure with double tower and double cable plane,the span layout being(52+88+320+88+52)=600 m.The bridge deck cranes on both sides of the closure mouth to lift the mid span closure section is used in original design.Due to the limitations of the bridge deck crane space,a single side bridge deck crane is chosen to lift the closure section for closure.In order to ensure that the closure state of the span is the same as the closure state of the bridge deck crane on both sides of the original scheme,and to understand its adverse effect on the bridge alignment and cable force,the parametric sensitivity of the maximum cantilever state before closure is studied by finite element method.The research results indicate that the lifting weight and tensioning cable force of the beam segment have the greatest impact on the maximum cantilever state of the main beam shape before the closure of the mid span.A unilateral lifting construction and control plan is proposed,and compared with bilateral lifting.The results show that the bridge cable force and linear unilateral lifting construction effect are good.

关 键 词：桥梁工程 鳌江特大桥 斜拉桥 组合梁 中跨合龙 架设方法 单边吊装 线形及索力分析 

分 类 号：U445.46[建筑科学—桥梁与隧道工程]