常泰长江大桥天星洲专用航道桥支座灌浆施工关键技术  

Key Technology of Bearing Grouting Construction of Tianxingzhou Dedicated Channel Bridge of Changtai Yangtze River Bridge

作　　者：王辉[1,2] 种子康 唐震 厉勇辉 WANG Hui;CHONG Zikang;TANG Zhen;LI Yonghui(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan,Hubei430040,China;CCCCSHEC Fourth Engineering Co.,Ltd.,Wuhu,Anhui241060,China;College of Civil and Transportation Engineering,Hohai University,Nanjing,Jiangsu210003,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan,Hubei430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan,Hubei430040,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]中交二航局第四工程有限公司,安徽芜湖241060 [3]河海大学土木与交通学院,江苏南京210003 [4]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [5]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040

出　　处：《施工技术(中英文)》2025年第6期110-115,共6页Construction Technology

基　　金：中交二航局科研课题(EHYF⁃2021⁃A⁃07⁃005)。

摘　　要：常泰长江大桥天星洲专用航道桥是世界上最大跨径公铁两用钢桁拱桥,铁路侧中支点竖向支座为19000t球形支座,是世界上最大吨位支座,支座底板尺寸大,灌浆层厚度小,灌浆材料流淌距离大,灌浆材料性能要求高,灌浆层施工质量难保证。开展了灌浆试验研究,设计了一种大流动、低变形、高抗裂新型复合支座灌浆材料,确定了一种适用于超大型支座灌浆材料性能参数;开展支座底板气泡分布规律研究,提出添加消泡剂和增加流入支座排气距离气泡防治措施;采用改进型立轴式砂浆搅拌机,解决大方量灌浆料配制问题,提出了重力法分步灌浆施工工艺,提高灌浆材料流动势能,支座锚栓孔和底面灌浆层采用分步灌浆工艺,实现了支座底板灌浆层连续浇筑施工,保证了支座灌浆层施工质量。Tianxingzhou Dedicated Channel Bridge of Changtai Yangtze River Bridge is the world’s largest⁃span highway⁃railway steel truss arch bridge.Its mid⁃support vertical bearing on the railway side is a 19000t spherical bearing,currently the heaviest of its kind globally.The construction faced significant challenges due to the bearing’s oversized baseplate dimensions,thin grouting layer thickness,extended flow distance of grouting material,and stringent performance requirements for the grouting material that compromised construction quality assurance.To address these issues,grouting experimental research was conducted to develop a novel composite grouting material characterized by high⁃fluidity,low⁃deformation,and high⁃crack resistance,establishing performance parameters for super⁃large bearing grouting materials.Bubble distribution patterns in the bearing baseplate were investigated,leading to proposed anti⁃bubble measures involving defoaming agent addition and increased venting distance.A modified vertical⁃shaft mortar mixer was adopted to resolve large⁃volume grouting preparation challenges.A gravity method with step⁃by⁃step grouting process was introduced to enhance grouting flow potential energy.By implementing separate grouting procedures for anchor bolt holes and baseplate grouting layers,continuous casting of the bearing baseplate grouting layer was achieved,which ensured high⁃quality construction of the bearing grouting system.

关 键 词：桥梁 拱桥 支座 灌浆材料 密实度 施工技术 

分 类 号：U445[建筑科学—桥梁与隧道工程]