38888 meters, replace the "protective clothing" for the first subway in New China

Correspondent Wu Xiangyu

"As of 4 am today, the contact rail protective cover has been replaced for 38,888 meters, and 90%of the total construction volume was completed ..." On July 20, at the construction site of the Beijing Metro Line 1, Wang Changli, the staff of the construction team, to the project chief of the project chief worker. Report the daily construction.

Beijing Metro Line 1 was built in 1965. It was opened to traffic in 1969. From the west of Apple Garden Station, east to Sihui East Station, 31 kilometers in length, a total of 23 stations and 2 vehicle sections. It is the first subway in Beijing. The line is also the first subway in New China. The electrification company of China Railway 14th Bureau is responsible for the contact cover replacement project.

"Line 1 contact rail protective cover was originally used with wooden protective boards and cast iron brackets. Due to long -term use, wood protective boards are prone to aging, decay, cracking, broken, cast iron brackets and other problems. There are hidden safety hazards." Li Wenhui, the person in charge of the project, introduced. The protective cover replacement project shall transform the existing wood contact rail protective cover and cast iron protective bracket into glass fiber reinforcement cover and glass fiber reinforcement protective brackets. Electric shock accidents occur to protect personal safety.

Construction site of contact rail protective cover

In order to ensure that the normal loading of the passenger operation of Line 1 is not affected, the daily construction needs to be shut down at the midnight after the station is shut down and the contact rail is controlled at midnight. difficulty.

Because there are only less than 2 hours of operation every day, in order to improve the efficiency of work, the project department carefully planned, strictly control the construction time, and organize technical personnel with strong organizational technology to conduct overnight work. After the daily construction is completed, the project department strictly controls the accuracy of the protective cover. After each installation is completed, the review and testing will be performed one by one to ensure that the horizontal distance from the contact rail to the rail is not available, and it can meet the safety operation requirements of the subway.

After the transformation of Metro Line 1 contact rail protector, it is equivalent to replacing the "protective clothing", which can effectively improve the overall quality, technical level and safety and reliability of the operation.

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