武汉二七长江大桥钢板桩围堰水下封底技术  

Underwater Concrete Bottom Sealing Technology of Steel Sheet Pile Cofferdam of Erqi Yangtze River Bridge in Wuhan

作　　者：刘博[1] 蒋本俊[1] 雷美清[2] 

机构地区：[1]中铁大桥局集团第三工程有限公司,广州510800 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《土工基础》2010年第5期14-16,26,共4页Soil Engineering and Foundation

摘　　要：武汉二七长江大桥通航孔主桥为三塔双索面结合梁斜拉桥,5#墩为边主塔墩,位于武昌江岸大堤前滩地坡脚上,采用先施工钻孔桩防护岸坡、然后开挖墩位处河槽、最后安装围堰内支撑桁架、插打钢板桩形成围堰。该围堰具有钢板桩长、面积大、防护深度深等特点。主墩钻孔桩完成后,需清理围堰内近10 m淤积物,然后进行全围堰平面5 m厚混凝土水下封底,形成深基坑作业面。It was the cable stayed bridge with three towers and two cable planes, which belonged to the navigable span main bridge of Erqi Yangtze Bridge in Wuhan. The 5# bridge pier was the main tower pier, located in the base of slope of Wuchang river levee. For its construction, the bored hole pile was used to reinforce the levee slope, then the river channel was dug, at last, the internal brace girders was installed and the steel sheet pile was inserted to form the cofferdam, which has the character with the long length of steel sheet pile, large scale area and the deep of height protection. After the completion of bored hole pile of main tower pier, it was necessary to desilt the mud with 10.0 m along depth in the cofferdam, then the concrete bottom with 5.0 m thickness was sealed to form the construction site of deep foundation.

关 键 词：武汉二七长江大桥 钢板桩围堰 混凝土水下封底 桥梁施工 

分 类 号：TU473[建筑科学—结构工程]