Geometric Shape and Position Control Technology of CRTS III Slab Ballastless Track Based on Informatization Technology.

CRTS III slab track adopts unit block structure, which has become the main track structure of 300km/h and above high-speed railway in China. The geometry of ballastless track is the key to ensure the comfort of train operation. In order to realize the geometric shape and position control of CRTS III slab track in the whole process and provide high-speed, stable and comfortable operation conditions for trains, this paper studies the design, manufacture and construction of the track. In the design phase, the layout software is used to realize the intelligent generation of vertical and plane layout scheme. In the manufacturing stage, the supporting mold, tooling and software are developed according to the production process of the track slab to implement automatic measurement and control, and manufacturing accuracy of the track slab platform is ensured by means of information technology. In the construction stage, construction control software is used to dynamically modify the geometric shape and position of the track slab and fulfill layered control of the ballastless track bed, which can effectively improve the smoothness of the high-speed railway line. This technology has been used in Nanchang - Ganzhou High-speed Railway, Shangqiu-Hefei-Hangzhou High-speed Railway, Hefei - Anqing High-speed Railway successively, and played a decisive role in ballastless track bed structure control, fine adjustment and smoothness index control, etc. [ABSTRACT FROM AUTHOR]