Wuhan-guangzhou Passenger Line At One Section Of Two-block Non-ballasted Track Construction Key Technologies

With massive construction of railway line for passenger traffic in China, the ballastless tracks were widly applied. However, the construction technology of ballastless track still lacked mature experience. Some key technical problems for twin-block ballastless track construction were discussed on the basis of a bid section in Wuhan-Guangzhou railway line for passenger traffic. The main works of the thesis are as follows.1. The developments and main structural types of ballastless tracks in the world were summarized. And the project survey and characteristics about the Wuhan-Guangzhou railway line for passenger traffic were introduced.2. The key construction technologies of twin-block ballastless tracks were introduced and analyzed and the main technical contents include as follows: track construction survey; HGT construction; track installing; slab concrete pouring and maintenance; construction craft process of tracks etc.3. The key construction technologies of ballastless and continuously weded switch were introduced and main technical contents include as follows: switch installing and construction craft process of continuously welded switch laying etc.4. The construction technology of continuously welded rail (CWR) of the slab track was discussed, such as construction craft process of 300m long rail welding in factory or at open site, loading, transporting and laying down, etc.. And the rail grinding technology and construction technology of rail expansion device were also introduced.In this dissertation, the goal of the main works mentioned above is to strictly control post-construction settlement and structural deformation. The core is to guarantee regularity, stability and durability of ballastless track. And the target is to realize the speed of 350 km/h for the infrastructures. In a word, some beneficial references are espected for independent innovation of construction technology of ballastless track in Chinese railway line for passenger traffic.