Analysis of Influencing Factors of Track Static Geometric Deviation of Super-Long-Span HSR Bridge

Aiming at deformation characteristics of super-span bridge and track in high-speed railway at the acceptance stage, the key factors to track static geometrics are identified, namely the route profile, surrounding temperature, construction deviation and ballast density deviation. According to the study results, the principles of track profile setting is proposed, and the integrated criteria of midpoint chords based on 60 m, 30 m and 10 m is recommended to determine the track target geometric profile. The optimized track adjustment scheme should meet two conditions, first condition is that the irregularity midpoint chord values should not exceed 6 mm/60 m, 3 mm/30 m and 1 mm/10 m, and second condition is that the adjustment range of ballast thickness should be within ( -20 mm~+100 mm).

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