针对泰州大桥南锚沉井基础的结构特点和施工方法，设计了施工安全监控方案。施工期监测成果分析表明：沉井下沉初期沉井底部刃脚附近水平方向的拉应力较大，将此项物理量作为下沉的控制指标，有效指导了沉井施工；侧壁土压力分布随入土深度呈先增加后减小规律。

Aiming at the structure features and construction methods for the south anchor caisson foundation of Taizhou Yangtze Highway Bridge, this paper presents a design scheme of security monitoring in construction. The result from monitoring data in construction shows that the horizontal tension stress which near blade foot at the bottom of well are greater in initial well sinking. It will effectively guide the well construction with the physical quantity as the control index of well sinking. Sidewall earth pressure increases first, and then decreases with the increase of embedment depth.

冯兆祥（1968－），男，江苏姜堰市人，研究员级高级工程师，研究方向为桥梁工程