The construction of the first cast-in-place box girder of the construction section of the South Fourth Ring Project in Zhengzhou city, which was constructed by the Construction company of China Construction Engineering Group 7 Engineering Group, was completed successfully. After the Spring Festival, the area quickly organized nearly a thousand construction troops, the whole line 0# block is parallel operation in a large range, the cantilever beam is being assembled. The construction of this area started in July 2018. After the successful lifting of the first foundation pile, the first cap, the first pier column, the first 0# block and the first prefabricated box girder, the construction of the superstructure has entered the stage of superstructure construction.
The main role of the 4 truss gantry Crane is to directly lift the section splicing precast beam, road width is two-way 4 lanes, truss Gantry Crane across the whole viaduct, from the ground by two 100 tons of crane prefabricated beam on the bracket, This process is repeated after the prestressed tensioning work is completed until the entire viaduct is assembled.