The main railroad overbridge of Zhengzhou city center joined successfully over Zhengzhou busy northern station on the evening of October 25th, 2010, so as to lay the foundation for opened traffic of the bridge.
The railroad overbridge project’s final closure of Zhengzhou city center only has  two meters wide, it was planned to begin to join on 3 p.m. But it was the very busy Zhengzhou railway station under the bridge, where the buses were more than 200 one day. It was the first time of closure construction over large span in such condition. So as to ensure the safety, the construction side increased the measurement times, according to the date and the temperature condition, the closure construction was delayed to 8 o’clock in the evening. When it began to construct, much shotcrete was sprayed to the final closure by the shotcrete pump which was designed by our company, so as to complete the closure work successfully.