China News Service, Tianjin, April 5th (Zhang Shaoxuan) The reporter learned from the project department of the second bid section of the Jingbin Railway of the China Railway 18th Bureau Group that on the evening of April 4th, the last group of ballastless tracks of the Beichen Bridge on the Jingbin Intercity Railway The bed slab concrete pouring is completed.
So far, the construction stage of the Jingbin Intercity Railway has ushered in a major node victory, marking the complete completion of the construction of the ballastless track from Baodi to Beichen, creating favorable conditions for subsequent track laying operations and line opening and operation. The project is scheduled to open to traffic by the end of 2022.
As a key project of Beijing-Tianjin-Hebei transportation integration, the Jingbin Intercity Railway starts from Beijing Sub-Central Station in the north and ends at Tianjin Binhai New Area in the south. The total length of the line is about 172 kilometers, and the maximum design speed is 350 kilometers per hour. The section from Baodi to Beichen is about 53 kilometers long. kilometer.
The Beichen Bridge, which has completed the construction of the ballastless track this time, is 31.74 kilometers long. It has crossed the expressway five times and crossed 10 rivers. The laying of the ballastless track faces a wide range of points, difficult material supply, limited work space, and many crossing operations. many difficulties.
"The construction quality of the ballastless track is the key to ensuring the safe and stable operation of the train. The CRTS III slab ballastless track is laid on the Jingbin Intercity Railway. We carry out technical tests before laying, master the construction methods of each process, and optimize the concrete ratio and pouring. Process and formwork construction plan. During the construction, the on-site technicians use the automatic measurement system to control the accuracy and strengthen the process management to ensure that the lateral offset and elevation deviation of each group of ballastless track bed slabs are controlled within 3mm.” China Railway 18th Bureau Group Jin Xuesong, head of the project department of the second bid section of the Jingbin Railway, introduced.
The Jingbin Railway is the third high-speed railway channel connecting Beijing and Tianjin. After the whole line is completed, it will be connected with the Jingtang, Beijing-Tianjin intercity railways, and the Tianjin-Qinhuangdao and Tianjin-bao high-speed railways.
It only takes about 1 hour from Beijing Tongzhou to Tianjin Binhai New Area. While further optimizing the Beijing-Tianjin-Hebei transportation structure, it will create a Beijing-Tianjin-Hebei one-hour traffic circle on the track, and provide more comfortable and convenient travel for people in the three places. new channel.
In addition, it will also play an important role in promoting regional cooperation and coordinated economic development.
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