China's northernmost electrified railway reconstruction project has made new progress

China News Service, Qiqihar, September 23 (Wang Delin, Chang Yongmei) On September 23, the concrete pouring operation of the first continuous beam of the Namur River Super Bridge of the Fuyu-Jiagdaqi Railway (Fuga Railway) reconstruction project was completed, marking that the bridge of my country's northernmost electrified railway reconstruction project has entered the superstructure construction stage.

The Nemur River Bridge is located in Nehe City, spanning the middle and lower reaches of the Nemur River, with a total length of 2.07 kilometers. It is a control project for the entire Fuga Railway. The bridge's continuous beams are designed to span the north and south protective embankments and flood control channels of the Nemur River. Each bridge has three spans, a total length of 144 meters, and a concrete volume of 1,200 cubic meters.

The concrete pouring of the first continuous beam of the Nemur River Bridge was completed. Photo by Wang Zhi

The biggest difficulty was that the construction safety risks adjacent to the business line were extremely high, and the 3,000-ton concrete weight required extremely high balanced load-bearing of the supports. Uneven settlement could easily lead to cracking of the beams. At the same time, the concrete volume was large, the pouring duration was long, and the organization of concrete supply and continuous pumping was difficult.

The China Railway 20th Bureau project team built a dual management and control system of "on-site dedicated protection + remote video real-time monitoring" to monitor and control the entire process of support erection, steel bar binding, concrete pouring, and maintenance. At the same time, the construction organization plan was optimized, and the load was piled at 1.2 times the total weight, and the continuous beam composite supports were tested for pressure. Technicians conducted settlement observations and data analysis every day to ensure safe and reliable organization of concrete pouring.

During the construction process, special personnel were assigned to inspect each tank of concrete entering the site. Three shifts were implemented, and the layered and segmented symmetrical pouring method was successfully completed in one go. This set a new record for single continuous beam pouring construction in the Fuga Railway Renovation Project and kicked off the construction of the superstructure of the bridges across the entire line.

The current project is advancing various construction tasks such as new stations, supporting facilities, station upgrades, and bridge and culvert renovations in an efficient and orderly manner.

It is understood that after the reconstruction of the Fuga Railway, the maximum operating speed of the line can reach 160 kilometers per hour, and the fastest running time from Jiagedaqi to Harbin will be shortened by more than 3 hours, which will greatly facilitate the travel of people along the line. (over)