通过腐蚀环境调查、工程调研、暴露试验等明确了影响华南通明海特大桥混凝土结构耐久性的主要因素，确定了典型构件的腐蚀作用等级。通过典型构件中应力的数值分析及荷载、环境等共同作用的室内模拟试验，研究了荷载对混凝土中氯离子扩散的影响。考虑实际工程荷载作用，建立了符合实际环境与工程特点的混凝土结构耐久性设计方法，明确了工程耐久性设计参数，确定了全寿命周期成本最优的附加防腐蚀措施方案。

The main factors affecting the durability of concrete structures for Tongminghai Bridge in South China were identified and the corrosion grades of typical components were determined through corrosive environment investigation, engineering investigation and exposure test. The effect of load on chloride ion diffusion in concrete was studied through numerical analysis of stress in typical structures, indoor simulation test under interaction of load and environment. Considering the actual engineering load, durability design method of concrete structure was established in accordance with the actual environment and engineering characteristics. The engineering durability design parameters were defined and the additional anti-corrosion measure scheme with optimal life cycle cost was determined.