Research on Emergency Repair Technology of Bi-Block Sleeper Ballastless Track in Tunnel
As China's high-speed railway mileage ranks first in the world,some unexpected accidents are inevitable.As one of the main structures of railway ballastless track in China,it is imperative to study its emergency repair technology to ensure that railway can maintain uninterrupted safe operation when disaster occurs.On this basis,this article made a study of the emergency repair technology of bi-block sleeper ballastless track bed in tunnels.Based on determining the technical principle of emergency repair of bi-block sleeper ballastless track bed,a technical scheme for emergency repair of bi-block sleeper ballastless track with secondary demolition and one time casting was developed and the main construction process and control measures for track slab emergency repair with secondary demolition and one time casting were put forward.According to the theoretical calculation results,it is proposed for the first time that the speed limit of high-speed railway ballastless track during emergency repair construction can reach 80 km/h.The research conclusion can provide reference for future emergency repair construction of bi-block sleeper ballastless track.
tunnelbi-block sleeper ballastless trackprinciple of emergency repairtechnical schemecontrol measures
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