折板式薄壳渡槽简介

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。

An introduction of shell aqueduct in folded plate structure

The main advantages and disadvantages of U-reinforced concret shell aqueduct is adopted widely in water supply project at present are analysed. The latter are mainly not convenient for the making of the round reinforcement and formwork, and for the pouring of concrete in round section during the construction. A new form concrete shell aqueduct in folded plate structure is introduced. It keeps the basic advantages of the U-shell aqueduct and avoids its main disadvantages. The design method of shell aqueduct in folded plate structure is presented. An example for three different aqueducts-U, folded plate and rectangular section, under equal working condition are analysed. The results show the shell aqueduct in folded plate structure is more reasonable. In addition, the possibility and reasonablness of folded plate structure with closed section which can be used in box structure of combining bridge and aqueduct into one are inquired.