钢筋混凝土U形薄壳渡槽,是近几十年来发展起来运用最广泛的一种渡槽结构形式。这种渡槽,水力条件好,纵方向的刚度大,横方向的内力小,交付建筑施工时也很简便。但在设计这种渡槽时,遇到架设槽身的支墩与支墩之间的跨度大于槽本身横向宽度的3倍时,就要按长壳理论分析。事实上绝大多数渡槽跨度都大于槽身宽度的3倍,都得 Reinforced concrete U-shaped aqueduct is the most widely used form of aqueduct that has been developed in recent decades. This kind of aqueduct has good hydraulic conditions, large longitudinal rigidity and small internal forces in the horizontal direction. It is also very convenient for the construction to be delivered. However, in the design of this aqueduct, encountered the erection of the body of the pier and the pier between the span greater than 3 times the width of the groove itself, we must press the long shell theory analysis. In fact most of the aqueduct span greater than 3 times the width of the trunk, have to