Beijing Guangzhou high speed railway will return to 350 km / h

Hubei Daily News (reporter Liu Yu, correspondent Zhang Jun) "the long rail car continues to push forward, confirming that the road cleaning is completed." At about 0:20 on October 16, under the command of the guide of the long rail car, the long rail car carrying two 300m rails slowly drove into the station of Chibi north station. Wuhan Railway Department confirmed that this is the first long rail replacement operation in Hubei section of Beijing Guangzhou high speed railway and the largest one in 10 years. Qin Jie, deputy director of maintenance section of high speed railway of China Railway Wuhan Bureau Group Co., Ltd., introduced that the track change operation was located at about 800 meters in Chibi north station, and the replaced rail was about 2.1 kilometers. More than 300 railway workers completed the replacement operation using the "skylight time" from 16th to 18th. "This is the first time in 10 years to change tracks in the main line of Chibi north station, because the rail wear in this section is close to the maximum value. In order to ensure the safety of high-speed rail driving, it must be changed." According to the insiders involved in the rail change operation, this section of steel rail was paved before 2009 and has reached the overhaul period. Moreover, this section is close to the station, with high vehicle density, and the wheel to rail wear is greater compared with the section rail. At the same time, the maximum gradient of the section is 15 ‰, which belongs to the slope terrain. The force between the wheel and the rail is larger than that of the straight line, and the friction is more serious.

it is understood that the new rail replaced this time is produced by WISCO. Compared with the rail 10 years ago, the steel quality of the rail is cleaner, the surface is smoother, the dimension accuracy is higher, and the fatigue resistance is stronger. According to

, other sections of Beijing Guangzhou high speed railway are also changing tracks to achieve speed. The long rail replacement is also one of the preparations for Beijing Guangzhou high-speed railway to return to 350km / h for infrastructure, a 6031
railway official said. In 2009, Wuhan Guangzhou high-speed railway was put into operation at a speed of 350 km / h, and in 2011, the speed dropped to 300 km / h after the rear end accident of Ningbo Wenzhou Railway. In September 2017, the Beijing Shanghai high-speed railway took the lead in achieving 350 km / h; in August 2018, the Beijing Tianjin Intercity line was replaced with the Fuxing high-speed railway, all of which achieved 350 km / h operation. At the beginning of this year, it was revealed that the operation speed of Beijing Guangzhou high-speed railway will be restored from 300 kilometers to 350 kilometers per hour.

on December 26, 2009, Wuhan Guangzhou high speed railway was opened to traffic, marking that China has entered a new era of high-speed railway. On December 26, 2012, Beijing Guangzhou high speed railway was put into operation, with a total length of 2298 km, including 518 km long main line from Luohe west of Henan Province to Chibi north of Hubei Province under the jurisdiction of Wuhan railway, with a design operation speed of 350 km / h, and seamless rail was used throughout the whole process. According to

, the Hubei section of Beijing Guangzhou high speed railway is in good operation condition. Wuhan Railway Bureau of China railway started to carry out large-scale replacement of accessories and wearing parts since December of last year for a few equipment with service life and overhaul life, including a few short rails. As of October 16, 1756.66 meters of worn rail has been replaced in Hubei section of Beijing Guangzhou railway, accounting for 0.3% of the total operating mileage; 36 sets of worn turnout rail parts have been replaced, accounting for less than 10%.