大型钢沉井整节段制造、运输与现场接高施工技术  

Construction Techniques for Manufacturing,Transporting and Site Jointing of Full Lifts of a Huge Steel Caisson

作　　者：余本俊[1] 

机构地区：[1]中铁大桥局集团有限公司,湖北武汉430050

出　　处：《桥梁建设》2013年第2期110-115,共6页Bridge Construction

摘　　要：合福铁路铜陵长江大桥主桥为双塔多跨连续钢桁梁三索面斜拉桥,其3号桥塔墩采用圆端形沉井基础,沉井高68m,其中上部18m为钢筋混凝土结构,下部50m为钢壳混凝土结构,总重约5 000t。50m钢沉井在工厂分6节制造、组拼,由1 200t浮吊起吊装船、12 800t驳船运输至墩位,第1节钢沉井利用浮吊整节段起吊入水后自浮,在墩位处抛设锚锭临时定位,第2～6节钢沉井利用浮吊整节段起吊并对接接高,钢沉井采用无导向船重锚精确定位。实践证明,大型钢沉井整节段制造、运输、现场整节段对接接高施工技术保证了钢沉井的整体质量,加快了沉井施工进度。The main bridge of Tongling Changjiang River Bridge on Hefei-Fuzhou Railway is a multi-span continuous steel truss girder cable-stayed bridge with double pylons and triple cable planes. The pylon pier No. 3 of the bridge is supported on the round-ended caisson foundation that is 68 m high, of the which the upper 18 m part is the reinforced concrete structure and the lower 50 m part is the steel shell concrete structure that totally weighs about 5 000 t. The 50 m steel caisson was manufactured and assembled in 6 lifts in workshop, loaded onto the barge by the 1 200 t floating crane and transported to the pier site by the 12 800 t barge. At the pier site, the first lift of the caisson was integrally lifted to the river by the floating crane, floated there and was temporally positioned by the anchors. The second to the sixth lifts were integrally lifted in succession by the floating carne and jointed with the previous lift（s） of the caisson. The caisson was accurately positioned by the heavy anchors without utilizing the guiding barge. Practice proves that the construction techniques for manufacturing, transporting and site jointing of the full lifts of the huge steel caisson can ensure the overall quality of the caisson and can also acceler-ate the construction progress of the caisson.

关 键 词：斜拉桥 基础 沉井 制造 运输 接高 桥梁施工 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U443.131[交通运输工程—道路与铁道工程]