马鞍山长江公路大桥北锚碇沉井下沉施工技术  

Construction Techniques for Sinking of Caisson for North Anchorage of Maanshan Changjiang River Bridge

作　　者：王永东[1] 汪学进[1] 

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040

出　　处：《世界桥梁》2011年第3期25-28,32,共5页World Bridges

摘　　要：在马鞍山长江大桥北锚碇沉井基础下沉施工过程中,根据地层的深入和地质情况变化,先采取沉井四周布置降水井、水力吸泥机取土的排水下沉法,后期则采取搭设钢平台、安装龙门吊等设备进行不排水吸泥下沉的方法,终沉阶段启动空气幕助沉措施,确保了沉井下沉的稳定,在加快施工进度、提高工程质量、降低施工成本等方面取得了显著效果。In the sinking process of the caisson for the north anchorage of Maanshan Changjiang River Bridge,according to the deep-going into the stratum and changing of the geologic conditions,the caisson was sunk down in the early stage by the method of arranging dewatering wells around the caisson,taking out soil inside the caisson and dewatering by the hydraulic dredger,in the late stage by the method of dredging without dewatering,using the steel platform and gantry crane and in the final stage by the aid of air curtain.With all these methods as mentioned,the stable sinking of the caisson was ensured and the sound effect of the construction progress accelerating,construction quality improving and construction cost reducing was achieved.

关 键 词：悬索桥 沉井基础 施工 排水 下沉 空气幕 

分 类 号：U445.557[建筑科学—桥梁与隧道工程]