Research on Height-adjustable Ballastless Track Structure
In view of the low adaptability to ballastless track foundation deformation,this paper proposes a height-adjustable ballastless track system consisting of"fastening+pad",which can flexibly adjust the height of track structure and actively adapt to sub-rail foundation deformation.This paper establishes a finite element model for overall stress analysis of height-adjustable ballastless track structure to analyze the reasonable size of track structure,and establishes a calculation model for local stress of track to analyze the influence of pad thickness change and the stress state of anchor bolts.The results indicate that when the height of sleeper block is 200 mm and the burial depth is 140 mm,the stress on each component is small;by replacing pads with different thicknesses,the vertical adjustment of track structure from 0 to 60 mm can be realized;anchor bolts can work normally and meet the strength design requirements.
ballastless trackvertical height adjustmentfoundation settlementmovable rail support standpadanchor boltfasteningsleeper block
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