Construction technology of double-block ballastless track of Unit one of Section III at Wuhan-Guangzhou high-speed railway

As the core technology of the high speed railway(HSR) or dedicated passenger line,the construction accuracy and durablity determine the safety and comfort of the train travelling,and decide the service life of the track directly.Slab track and double-block track is the most frequent types of ballastless track,and the CRTS I-type double-block is the typical representative of the latter.Wuhan-Guangzhou high speed railway is the first HSR in China which adopted ballastless track in the whole line.In this paper,based on the construction of Unit one of Section Ⅲ at Wuhan-Guangzhou high-speed railway,major features of ballastless track are described,and the technologies of many aspects are summarized,such as design,construction,checking standard,auxiliary equipment,etc.