The Sichuan-Guizhou and Chongqing-Huainan Railways will be intensively repaired in 2026

China News Service, Guiyang, November 11 (Reporter Qu Honglun) The reporter learned from the China Railway Chengdu Bureau Group Co., Ltd. (hereinafter referred to as the China Railway Chengdu Bureau) on the 11th that on November 10, with the completion of the large-scale tamping construction work on the Qilongxing to Minfu Temple section of the Sichuan-Guizhou Railway, it marked the successful conclusion of the 33-day intensive repair of the Sichuan-Guizhou and Chongqing-Huaihua Railway in 2026.

The Sichuan-Guizhou Railway was put into operation in 1965. It runs from Chongqing in the north to Guizhou in the south. It is an important part of the road network skeleton in southwest China and one of the important trunk lines of the rail-sea combined transportation of the Western Land-Sea Corridor. As a national railway Class I double-track electrified railway connecting Chongqing City and Huaihua City, Hunan Province, the Yuhuai Railway is a key transportation artery in the southwest region connecting the Yangtze River Economic Belt and the New Land-Sea Corridor in the West. It shoulders the important task of ensuring the efficient operation of regional passenger and cargo transportation. Since October 9, the National Railway Chengdu Bureau has simultaneously launched centralized equipment renovation and construction of the two lines.

In order to ensure the safe, stable and orderly progress of this centralized repair, the National Railway Chengdu Bureau has set up on-site headquarters in Chongqing and Zunyi to coordinate the Chongqing Works Section, Guiyang Works Section, Fuling Works Section, Chengdu Works Large Locomotive Section, Chengdu Works Section More than 10 units and more than 5,000 operators, including the Maintenance and Maintenance Section, Chongqing Electric Power Section, Guiyang Electric Power Section, and Chongqing Power Supply Section, worked together to carry out maintenance and repair operations such as track changing, cleaning, tamping, and grinding in an orderly manner.

During this period, each unit actively innovated processes and methods to continuously improve the quality and efficiency of operations. In response to the fact that the line has many curves and a small radius, the Chongqing Public Works Section used a highly difficult flash welding process for the first time in the same skylight period to separately process the "start joint" and "middle closing point" of the line; the Guiyang Public Works Section innovatively implemented a new integrated operation model of "same-day cutting, screening, unloading and tamping" , and adopted the "flash welding + gas welding" synchronous welding process to greatly improve the quality and efficiency of track bed cleaning and rail changing construction; the Chengdu Public Works Machinery Section transformed existing equipment and adopted a "thorough cleaning" method for the first time, using large machinery to deeply clean and maintain the track bed ballast on both sides of the railway track.

This centralized repair successfully completed 75 kilometers of overhaul and track change of the Sichuan-Guizhou Railway, 35 kilometers of main machine penetration cleaning, 23 groups of turnout cleaning, 207 kilometers of line tamping, and 187 groups of turnout tamping; 217 kilometers of Yuhuai Railway were tamped by main machines. Key tasks such as grinding 323 kilometers of line machinery and overhauling and replacing 23,550 pillows effectively eliminated various equipment hazards, further improved the quality of line equipment, and provided a solid guarantee for the safe and smooth winter passenger and cargo transportation and subsequent Spring Festival travel.