结合南水北调中线工程中大型预应力混凝土箱形渡槽的结构设计，采用三维有限元技术对其受力性能进行了分析探讨。依此，证明所采用的渡槽结构型式及尺寸，预应力筋的布置方案是合理的。渡槽结构应力、变形满足规范要求。 Combined with the structural design of the large-middle prestressed concrete box aqueduct in the Middle Route Project of the South-to-North Water Transfer Project, the three-dimensional finite element technique was used to analyze its performance. Based on this, the type and size of the adopted aqueduct structure are proved, and the layout of the prestressed tendons is reasonable. The aqueduct structure stress and deformation meet the specification requirements.