苏通长江公路大桥索塔为世界上建成的最高桥塔。索塔锚固区采用钢混组合结构，其构造及受力机制复杂，结构耐久性问题需高度关注；300 m 塔高使得结构对风和环境因素相当敏感；高塔施工的抗风安全尤为重要。从索塔锚固区设计、索塔形态控制、抗风安全 3 个方面介绍苏通大桥索塔工程设计与施工的关键技术。

Sutong Bridge tower with 300.4 m is the highest one in the world, The tower anchor area uses the steel-concrete composite structure; its structure and the stress mechanism are complex, so it must be paid more attention to the structure durable issue. The 300 m height makes the tower quite sensitive to the environmental factors such as wind and temperature. The wind-resistance safety of tower in construction stage against the wind is important especially. In this paper, the design of composite structure is introduced. The key technologies of tower geometry control and wind resistance in construction stage are analyzed.