在水利工程建设中,常常遇到渡槽一类的输水建筑物,对于一些高度比较大的渡槽,大部分采用预制吊装进行施工,采用现场浇筑的已很少。由于渡槽的拱肋比较长,重量也比较大,目前一般工程都是采用分段预制、分段吊 In the construction of water conservancy projects, it is common to encounter aqueducts such as aqueducts. For some aqueducts with relatively large height, the majority of them are constructed by prefabricated hoisting, and few have been used for on-site pouring. As the aqueduct arch longer, the weight is relatively large, the current general project is the use of sub-prefabricated, sub-section crane