珠海洪鹤大桥主桥中跨合龙施工技术  

Construction Technology of Mid-span Closure of Main Bridge of Zhuhai Honghe Bridge

作　　者：陈山亭[1] 孙乾栋 CHEN Shanting;SUN Qiandong(The Fifth Engineering Co.,Ltd.of China Railway Major Bridge Engineering Group Co.,Ltd.,Jiujiang,Jiangxi 332001,China)

机构地区：[1]中铁大桥局集团第五工程有限公司,江西九江332001

出　　处：《施工技术（中英文）》2022年第18期51-53,84,共4页Construction Technology

摘　　要：珠海洪鹤大桥主桥由2座主跨均为500m双塔双索面叠合梁斜拉桥串联而成,为半漂浮体系结构。主桥上部结构为叠合梁,其标准梁段长12m。叠合梁架设以主塔为中心采用架梁起重机分节段悬臂对称施工,中跨合龙段采用敏感性模拟分析和低温定时合龙施工技术,有效减少钢梁温度配切合龙的不确定性,提高合龙的精准性和可靠性,降低架设过程中存在的安全风险,保证了叠合梁安装精度。The main bridge of Zhuhai Honghe Bridge is composed of two double-tower and double-cable plane composite beam cable-stayed bridges with main spans of 500 m in series, which is a semi floating system structure. The superstructure of the main bridge is a composite beam, and its standard beam section is 12 m long. The erection of the composite beam is symmetrical construction with the main tower as the center and the cantilever in sections by the girder crane. The sensitivity simulation analysis and low-temperature timing closure construction technology are used for the mid-span closure section, which effectively reduces the uncertainty of steel beam temperature matching and cutting closure, improves the accuracy and reliability of closure, reduces the safety risks in the erection process, and ensures the accuracy of composite beam installation.

关 键 词：桥梁工程 斜拉桥 叠合梁 中跨 低温 合龙 施工技术 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]