峡谷陡峭地形250t下河吊机设计与建造关键技术  

Key Technology of Design and Construction of 250t Lower River Crane in Steep Canyon Terrain

作　　者：周文 王保 朱志钢 ZHOU Wen;WANG Bao;ZHU Zhigang(School of Civil Engineering,Central South University,Changsha,Hunan 410075,China;China Railway Guangzhou Engineering Group Co.,Ltd.,Guangzhou,Guangdong 511459,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中铁广州工程局集团有限公司,广东广州511459

出　　处：《施工技术（中英文）》2023年第21期88-93,119,共7页Construction Technology

基　　金：中国铁路总公司科技研究开发计划:桥梁工程建设技术研究——拉林铁路重点桥隧工程建造关键技术研究(2017G006-B);中国中铁股份有限公司科技开发计划:拉林铁路藏木雅鲁藏布江特大桥430m中承式钢管拱桥施工技术研究(2016-重点-03)。

摘　　要：新建拉林铁路藏木雅鲁藏布江特大桥为430m跨的中承式提篮钢管混凝土拱桥,桥梁跨越水深达66m的雅鲁藏布江。主桥钢管拱肋在上游的雅鲁藏布江陡峭悬崖上方拼装场进行拼装,利用特殊下河吊机翻身、下河装船,通过驳船运至桥位起吊安装。结合西藏实际地形设计了陡峭峡谷地形下250t大悬臂特殊下河吊机,并研究了该下河吊机大悬臂主纵梁、江侧连接横梁等施工难点的关键建造技术,有效解决了陡峭地形下钢管拱肋节段翻身和下河难题。The newly⁃built Zangmu Yarlung Zangbo River Bridge of Lhasa⁃Nyingchi Railway is a half⁃through basket⁃handle concrete⁃filled steel tubular arch bridge with a span of 430m.The bridge spans Yarlung Zangbo River with a water depth of 66m.The steel tube arch ribs of the main bridge were assembled in the assembly yard above the steep cliffs of the Yarlung Zangbo River upstream,were then turned over and shipped by a special crane that can be operated in the river,and were finally transported to the bridge site for lifting and installation by using barges.Combined with the actual terrain,a 250t large cantilever special river crane under the steep canyon terrain of Xizang was designed,and the key construction technologies of the construction difficulties such as the main longitudinal girder of the large cantilever and the river⁃side connecting beam of the river crane were studied,thus effectively solving the problem of turning over and operating in the river of the steel tube arch rib section in steep terrain.

关 键 词：桥梁工程 钢管混凝土拱桥 钢管拱肋 下河吊机 设计 施工技术 

分 类 号：U445[建筑科学—桥梁与隧道工程]