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水闸上层结构,一般包括公路桥、工作桥、插板桥、胸墙等。上层结构的混凝土工作量是不大的,大约占水闸全部混凝土工作量的6～9％。但由于结构比较复杂,施工技术性较高,特别是在模板的支撑方面比较困难。过去经常采用的支撑方法是在闸孔内的底板上竖立几排冲天柱,以承受上层结构在施工时的全部重量。冲天柱的长度往往需要很长,冲天柱之间还要用纵横搭木以及剪刀撑搭牢,其结构与排架相同,见图1。这种支撑方法,不仅费工费料,而且在上层
Sluice superstructure, generally including highway bridges, working bridge, plug-in bridge, chest wall and so on. The workload of the concrete structure is not large, accounting for about 6 ~ 9% of the entire sluice workload. However, due to the complicated structure and high technical construction, it is more difficult to support the template in particular. The usual support method used in the past was to erect several rows of pillars on the bottom plate in the gate to withstand the full weight of the superstructure during construction. The length of the skybar often takes a long time, but also with vertical and horizontal between the sky column take the scissors and brace firmly, the structure and the same rack, shown in Figure 1. This support method, not only the labor costs, but also in the upper