摘要
武汉二七长江大桥通航孔主桥为三塔双索面斜拉桥,中主塔墩位于长江中心航道上,其下部结构基础为18根3.40 m钻孔灌注桩。采用双壁钢吊箱围堰法进行基础施工。钢吊箱围堰在工厂制造,完成后整体滑移下水并浮运至墩位,采用重力锚锭系统进行围堰定位;围堰定位完成后,插打定位钢护筒,将围堰与已经插打完成的钢护筒进行连接形成稳定的钻孔平台,插打剩余钢护筒,进行钻孔桩施工;钻孔桩施工完毕,将围堰下放至围堰封底设计标高,进行围堰清淤、堵漏,用垂直导管法依次浇注封底舱、底隔舱、侧舱封底水下混凝土,按照从两端向中间、从外向内的顺序分块、对称进行施工。
The navigable span main bridge of Wuhan Erqi Changjiang River Bridge is a triple-pylon and double-cable-plane cable-stayed bridge with its intermediate pylon pier located in the central shipping channel of the Changjiang River.The foundation of the pylon pier is made up of 18 nos.of 3.40 m bored piles and was constructed by the double-wall steel boxed cofferdam.The cofferdam was manufactured in shop,launched to river integrally and floated to the pier site where it was positioned by the gravity anchor syst...
出处
《桥梁建设》
EI
CSCD
北大核心
2010年第2期1-4,13,共5页
Bridge Construction
关键词
武汉二七长江大桥
桥梁基础
双壁钢吊箱围堰
桥梁施工
Wuhan Erqi Changjiang River Bridge
bridge foundation
double-walled steel boxed cofferdam
bridge construction