旧闸改造不同于兴建新闸 ,结构的型式受旧闸地质条件及尺寸的制约 ,改建的成败取决于地基应力状态。在总结工程设计和施工的基础上 ,对旧闸改造的结构选型、地基应力验算及采用丙乳混凝土处理混凝土结构碳化问题等几个方面进行了讨论 Different from the construction of the old gate to build a new gate, the structure of the type of gate constraints and geological conditions and size constraints, reconstruction depends on the success of the state of stress. On the basis of summarizing the engineering design and construction, this paper discusses the structural selection of the old gate, the checking of the foundation stress and the carbonation of the concrete structure with acrylic emulsion concrete