该桥为目前内地单跨跨径最大的双层钢桁梁,标志着狮子洋通道建设取得重要进展
粤港澳大湾区狮子洋通道跨西樵水道钢桁梁桥于9月12日完成合龙。该桥主跨165米,是目前内地单跨跨径最大的双层钢桁梁。狮子洋通道全长约35公里,连接广州南沙与东莞虎门、沙田,预计2029年建成通车。
AI-generated summary
狮子洋通道是继港珠澳大桥、深中通道之后大湾区又一超大型跨江通道工程。项目全长约35公里,连接广州南沙区与东莞虎门、沙田两镇。
中新网广州9月12日电 (记者 蔡敏婕)粤港澳大湾区核心枢纽工程——狮子洋通道跨西樵水道钢桁梁桥12日完成11个节段拼装,实现精准合龙。
狮子洋通道是继港珠澳大桥、深中通道之后大湾区又一超大型跨江通道工程,全长约35公里,连接广州市南沙区和东莞市虎门、沙田两镇,主体工程由跨江主桥狮子洋大桥和两岸陆域引线工程组成。
西樵水道钢桁梁桥主跨165米,是目前内地单跨跨径最大的双层钢桁梁,可满足内河Ⅱ级航道通航标准。钢桁梁宽41米,桁高约15米,总重8100吨,共划分为11个节段,如同11块巨型“积木”,由工厂智能化预制运至现场精准拼装。
该钢桁梁桥位两岸均为基本农田,陆路运输受限;所跨西樵水道潮差达3米,且上下游桥梁通航净空不足,超高超宽构件无法整段运输。
更为关键的是,本项目双层钢桁梁跨度居内地同类型结构之首,每延米用钢量达50吨,为当前最大延米重设计指标。梁体宽幅、超重,临时结构承受的荷载显著增大,传统步履式顶推工法难以适用;此外,受通航条件限制,大规模水上临时支架群布设空间不足,施工组织难度极大。
针对上述难题,项目施工团队采用“水上部品化吊装+浮箱转轴翻身”工艺,将大型钢梁分解成若干部品构件,分批运抵现场,再由浮吊在水上逐段拼装,解决大型构件运输和岸侧场地限制难题。
同时,自主设计研发“模块化浮箱式构件翻身装置”,可在不依靠大型岸吊设备的情况下,完成400吨级钢构件的平稳翻转,施工更为安全、高效,为同类涉水桥梁施工提供可推广的技术方案。
目前,狮子洋通道建设稳步推进,主桥狮子洋大桥正进行猫道架设,引线工程正进行钢桁梁安装及箱梁架设等施工,整体进程过半。2029年狮子洋通道建成通车后,将横向串联粤港澳大湾区三大都市圈,辐射粤东西两翼,进一步织密“黄金内湾”骨干交通网络,为大湾区一体化协同发展注入强劲动能。
AI outlook — possibilities, not facts
狮子洋通道将于2029年建成通车
Very likely · Within years
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