Original title: The steel girder of the main bridge of the Jiyang Yellow River Road and Railway Dual-purpose Bridge of Jibin High-speed Railway has been closed for the first time
Workers' Daily-China Workers' Network reporter Yu Jiaxi correspondent Hu Faliang, Li Yang, Sun Dongxun
At 11:45 a.m. on July 31, with the last 3.5-meter-long, 14.4-meter-wide highway steel bridge deck slowly landing, and was steadily installed on the P37#-P38# pier steel girder closure, Jibin High-speed Railway Jiyang Yellow River Road and Railway Dual-purpose Bridge ushered in a major node, and successfully realized the precise closure of the first main span steel girder of the main bridge.
According to reports, the Jiyang Yellow River road and railway dual-purpose bridge is the world's largest span of tower girder consolidation, tower pier separation system road and railway joint construction, four towers and three main span asymmetrical short tower cable-stayed bridge, the main bridge is 1178 meters long, is the key control project of Jibin high-speed railway. The closure also marks a major breakthrough in the construction of key processes of the main bridge.
It is understood that the main bridge steel girder is divided into 3 times of closure, the P37 #-P38 # pier position steel girder closure mouth is a perfect "hand-in-hand" under the condition that the temperature, humidity and accuracy fully meet the relevant specifications.
Since July 25th, the project team has successively carried out the installation of the splicing plate and pylon, the lifting and hoisting of the rods, and the installation and fixing of the side punching nails with small mileage, waiting for the optimal closing temperature. After going through the procedures such as the installation of the large-mileage side punching nails, the locking of the bolt group, and the release of the support limit, the alignment of the steel beam and the position of the steel tower were measured many times. Under the condition that the data are normal, the on-site construction team stepped up the operation and finally successfully completed all the work of the first closure of the main bridge.
Located about 30 kilometers north of Jinan City, the Jiyang Yellow River Road and Railway Bridge connects Yaoqiang Airport Station and Jiyang Station, with a total length of 13.863 kilometers and a maximum cable-stayed cable force of 1,400 tons, ranking among the top in the world. After the completion and opening of the Jibin high-speed railway, it will completely end the history of Jinan's Jiyang, Shanghe and Binzhou main urban areas, and Huimin is not connected to the high-speed railway, and realize the interconnection between the Beijing-Shanghai high-speed railway auxiliary channel and the Beijing-Shanghai high-speed railway, which is of great significance for optimizing the layout of the province's high-speed railway network, driving the construction of Jinan's new and old kinetic energy conversion starting area, and promoting the high-quality economic and social development along the line.
Source: Workers' Daily client