本文介绍了国内外坝后式厂房取消厂坝间钢管伸缩节的工程实例,以有限元法计算了五强溪厂坝结构在常规荷载与温变荷载作用下的结构位移,并进行了各种计算条件与参数的敏感性分析,导出了结构位移与钢管附加应力间的关系,通过组合应力分析,说明在一定条件下,五强溪水电站引水钢管取消厂坝间伸缩节是可能的。 This paper introduces the engineering examples of abolishing the steel tube expansion joint between dam and dam at home and abroad at home and abroad. The structural displacements of Wuqiangxi dam structure under conventional load and warm load are calculated by finite element method. According to the sensitivity analysis of the calculation conditions and the parameters, the relationship between the displacement of structure and the additional stress of steel pipe is deduced. By means of the combined stress analysis, it is possible to cancel the expansion joint between the plant and dam at the Wuqiangxi Hydropower Station under certain conditions.