Dynamic Gauge of Small Radius Curves Reinforced by Rail Braces
To mitigate the dynamic gauge widening in small radius curves,rail braces and gauge rods are commonly used to reinforce the track.However,when heavy-duty track maintenance machinery is utilized for ballast tamping,gauge rods should be removed,resulting in an increased maintenance workload.This study aims to assess the feasibility of using rail braces solely without gauge rods on small radius curves to facilitate the maintenance by heavy-duty track maintenance machinery on such curves.A calculation model was developed to analyze the lateral load on small radius curves reinforced by rail braces and gauge rods.The model aimed to understand the impact of rail braces,gauge rods,and their combination on the dynamic gauge maintaining capacity of small radius curves.The results indicate that by exclusively using elastic rail braces,the dynamic gauge on small radius curves can be effectively maintained.It is recommended to install 1 pair of rail braces every 1 sleeper for curve radius(R)＜350 m,install 1 pair of rail braces every 2 sleepers for curve radius 350 m ≤ R＜450 m,install 1 pair of rail braces every 3 sleepers for curve radius 450 m ≤ R＜600 m,and install rail braces as appropriate based on track conditions for curve radius R ≥ 600 m or on straight tracks.
small radius curvenumerical analysisrail bracegauge rodgauge widening
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