泰州大桥北锚碇沉井封底总方量超过30 000 m³，为目前国内立方量最大的水下封底混凝土施工工程，其施工难度大，现场组织要求高。从沉井清基、封底设备布置、封底混凝土施工工艺等方面概略介绍泰州大桥北锚碇沉井封底施工技术。

The total quantity of concrete exceeds 30 000 m³ for the north anchor caisson of Taizhou Bridge, which is the largest quantity underwater concrete for bottom sealing construction till now in China, and its construction is quite difficult with high requirements for site organization. This article presents the bottom sealing construction technology for the caisson of north anchor of Taizhou Bridge mainly in the aspects of base cleaning, bottom sealing equipment arrangement and sealing concrete construction technique.