en.Wedoany.com Reported - The Lao section of the China-Laos Railway has recently commenced its first large-scale rail grinding operation since the line began operations. According to China Railway Kunming Group Co., Ltd., which is responsible for the construction, this grinding operation is expected to cover 164 kilometers of track, and the entire construction period will last until the end of July.
Starting from Kunming in southwest China's Yunnan Province in the north and ending in the Lao capital Vientiane in the south, the 1,035-kilometer China-Laos Railway was put into operation in December 2021. Since its opening, the line has seen a continuous surge in passenger and freight transport volume. With increasing transport intensity, the rails have experienced varying degrees of wear. To ensure the safe and stable operation of the line, China Railway Kunming Group Co., Ltd. has cooperated with the Laos-China Railway Co., Ltd. to carry out the first large-scale grinding of the rails on the Lao section, utilizing the window period of lower nighttime traffic density.
Fang Lyu, a large track maintenance machinery driver from the Kunming Track Maintenance Machinery Section of China Railway Kunming Group Co., Ltd., introduced that a large rail grinding train is used in the construction, which can precisely control the grinding amount within a range of 0.1 millimeters. For sections with minor rail surface damage, cyclic grinding is performed 4 to 6 times; for special sections with concentrated defects and heavier damage, grinding is intensified to 8 to 10 passes. Through standardized operations, rail surface damage can be effectively repaired or mitigated, preventing defects such as contact fatigue and corrugation, thereby improving train running smoothness and passenger comfort, and extending the service life of the rails.
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