At 4:40 a.m. on December 9, as the last spring bar fastener bolt was tightened, a new 1The 3-kilometer-long steel rail was successfully "put on duty" in the Hainan Island High-speed Railway, which means that the first long-track replacement construction since the Hainan Island High-speed Railway was opened in 2010 was successfully completed.
The construction started from zero o'clock, and after the order of the skylight point was issued, each team arrived at the designated operation site as planned, and entered the state of "combat" according to the predetermined division of labor. After the operator removes the fastener bolt with an electric wrench, and then uses the rail sawing machine to cut the rail that needs to be replaced, the other personnel divide into multiple ways and use a crowbar to dial the rail that needs to be replaced into the groove.
This construction section belongs to a small radius curve, and the EMU wheels are in contact with the rail for a long time at high speed, resulting in serious wear on the side of the rail. In order to ensure the smooth construction, from the middle of November Hainan Railway Haikou comprehensive maintenance section began a large number of construction preparations, in advance of 36 100 meters long rails transported to the construction site, through the box-type flash welding technology, the rails are welded into 4 long rails, and then apply for the construction "skylight" replacement, the construction is difficult, the construction period is tight.
After the completion of the construction of the new rail groove and rail replacement, the line inspection team will check the track gauge and level of the line in the track change section one by one to ensure that the quality of the line meets the standard. As the world's first high-speed railway around the island through the tropical coastal area, the Hainan high-speed railway has transported more than 100 million passengers, and this construction is also the first time in 13 years of operation to replace the long rail, which will completely eliminate hidden dangers and ensure the safety of high-speed rail transportation around the island.