南京长江第三大桥南主墩深水基础施工技术

Construction Technology of Deep Water Foundation of South Main Pier in the 3rd Nanjing Changjiang River Bridge

南京长江第三大桥南主墩深水基础施工是大桥建设施工存在的两大关键技术难点之一。阐述了南主墩基础浮式钢套箱施工方法的选择,大型钢围堰的选择,钢套箱的制作和定位,钢护筒的下沉等,并详细介绍了大直径深长钻孔灌注桩的施工方法和承台大体积混凝土的施工技术。

The south main pier foundation construction in deep water is one of the two key techniques for the 3rd Nanjing ChangJiang River Bridge.The choice of construction method about the float steel boxed cofferdam for the south main pier foundation,the choice of the large steel cofferdam,the manufacture and fixing of the steel boxed cofferdam and the sinking of the steel casing are described.The construction method about the large-diameter long bored pile and the construction technology about the large volume concrete are introduced in detail.