我专区近年来修建装配式渡槽,由于采用預制安装施工,避免了高空作业的不利条件,并由于在施工吊装上要求构件减輕减薄,这样,就逐漸促进了渡槽結构型式的变革,由重力式槽墩变革为框架双肢柱,由分块构件变为整体槽身,由矩形厚壁渡槽变革为U形薄壳渡槽。实践証明,U形薄壳渡槽比矩形渡槽具 In our zone, the fabricated aqueduct has been built in recent years. Due to the prefabricated installation and construction, the unfavorable conditions of working at heights are avoided. As a result of the requirement of the components to be lightened and thinned during the construction hoisting, the aqueduct structure type transformation is gradually promoted, Type of slot pier transformation into the framework of double limbs, from the block member into the overall body, by the thick-walled aqueduct into a U-shaped thin shell aqueduct. Practice has proved that U-shaped shell aqueduct than the rectangular aqueduct