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分析了目前在输水工程中较为广泛地采用的钢筋混凝土U型薄壳渡槽的主要优点及缺点.指出U型薄壳渡槽在施工中圆弧型的钢筋、模板制作不便、工作量大,及圆弧段的混凝土不便浇筑和插捣等.提出了一种新型的折板式钢筋混凝土薄壳渡槽结构,它保留了U型薄壳渡槽的基本优点,避免了其主要缺点.介绍了折板式薄壳渡槽的设计计算方法.并通过U型、折板型和矩型等三种断面型式的渡槽在相似工况下的横向应力分析的算例,表明折板式薄壳渡槽结构的合理性.此外,还介绍了封闭式折板断面作为桥、渡结合的箱型结构的合理性及可行性.
The main advantages and disadvantages of the U-shaped thin-shell aqueduct which is widely used in water conveyance project are analyzed. It is pointed out that the U- Circular section of the concrete inconvenience pouring and plugging etc .. A new type of folded plate reinforced concrete thin-walled aqueduct structure, which retains the basic advantages of U-shaped thin-walled aqueduct, to avoid the main shortcomings. Shell aqueduct design calculation method and through the U-shaped, folding plate and rectangular cross-section of the three types of cross-section of the aqueduct under similar conditions of the lateral stress analysis of the example that the folded plate shell aqueduct structure is reasonable. , Also introduced the closed flap section as a bridge, crossing the box structure of the rationality and feasibility.