变电站装配式柱下独立基础设计方法

为进一步推动变电站模块化建设,文章以变电站工程中现浇混凝土柱下独立基础为原型,分析其受力特点和基础形式,进行基础装配式分块和连接设计,并通过ABAQUS有限元模拟和相关规范公式验证所设计装配式基础是否满足承载力和抗裂要求。研究结果表明:分块设计方案较为合理,可以满足工厂制作方便、运输及吊装要求;预应力-抗剪键的连接方式适用于装配式基础,所设计的预应力筋和抗剪键满足基础接缝面的抗弯、抗剪承载力和抗裂要求,并且具有一定的安全储备。

To further promote the modular construction of substation, the cast-in-place concrete independent foundation in substation project is used as a prototype to analyze its force characteristics and foundation form, and the assembled block and connection design of the foundation is carried out, and the bearing capacity and crack resistance of the designed assembled foundation is verified through ABAQUS finite element simulation and relevant specification formula. The results show that the design of the blocks is reasonable and can meet the requirements of factory fabrication, transportation and lifting; the prestress-shear key connection method is suitable for the assembled concrete foundation, and the designed prestressed tendons and shear keys meet the requirements of bending and shear bearing capacity and crack resistance of the foundation joint surface, and have a certain safety reserve.