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本文结合南水北调河南段双洎河钢筋混凝土多纵梁渡槽结构设计，提出了采用改进的空间刚架结构方法计算结构设计控制截面的内力进行结构极限承载力配筋设计，采用三维混凝土有限元分析验算结构正常使用状态下截面应力状态的结构设计方法．利用１：５钢筋混凝土仿真试验模型实测数据对比验证结果表明，上述设计方法是可行的．
Combined with the design of Shuangtahe reinforced concrete longitudinal girder aqueduct in Henan section of South-to-North Water Diversion Project, this paper presents an improved design method of spatial rigid frame structure to calculate the internal force of structural design control section to calculate the reinforcement design of ultimate bearing capacity of the structure. Three-dimensional concrete finite element analysis STRUCTURAL DESIGN METHOD OF SECTION STRESS STATE UNDER NORMAL CONSTRUCTION. The simulation results of the 1: 5 RC simulation model show that the above design method is feasible.