The birth of the first ballastless track construction machinery for domestic railway equipment
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According to reports, compared with the ballasted track, the ballastless track has better structural continuity, smoothness, stability, constancy, durability and maintenance, can avoid the use of special ballast and environmental damage, eliminating high speed The ballast splash during operation, low structural height and light weight, is conducive to terrain selection. Although the technology is more complicated, the one-time investment is larger than the ballast track, but its service life is long, and it is basically maintenance-free during the service period. The maintenance work during operation can be reduced by more than 70%, which can effectively alleviate the operation and maintenance of high-speed railway. contradiction.
According to Pan Yong, an engineer in charge of the construction of ballastless track construction, the ballastless track construction machinery can change the condition of China's railway passenger and freight mixed line. The completed passenger dedicated track can withstand the running speed of passenger cars of nearly 400 kilometers per hour and greatly reduce maintenance. The frequency of the railway construction is greatly reduced. This engineering vehicle consists of 10 parts, such as installation, loading and fixing. When laying the rails, the rails are firstly inserted into the concrete that has been tamped before the initial setting by vibration method, and then the mechanical and manual team is used to install the most critical. Fixed support for the sleeper. Each class can lay about 200 meters of track.
This machine will be used for the track laying of the Zhengxi Passenger Dedicated Line. The 484.5-kilometer Zhengzhou Passenger Dedicated Line has a design speed of 350 km/h, and the high-speed rail requires extremely high technical requirements. The high-performance concrete of ballastless track has a durability requirement of 100 years. After the completion of the project, the settlement of the roadbed is required to be within 2 cm, and the general railway can reach the standard within 20 cm. The passenger dedicated line will lay a flawless track of 456.439 kilometers.
Pan Yong said that in Europe, there are many flawless tracks, and the price of the machine is also about 14 million yuan. The cost of the first flawless track construction machinery in China is about 7 million yuan, which will change China 150. The history of railway laying over the years has provided the cornerstone support for the development of high-speed railways in China.