Research on the Deformation Behaviour of the Track Interlayer Structure during the Deviation Correction of the Offset Ballastless Track

Abstract

In view of the problem that the large deviation of the ballastless track structure affects the smoothness of the line due to the complex geological environment, in order to realize the deviation correction and repair of the offset ballastless track within the skylight time to restore the smoothness of the line, we researched the technology and process of ballastless track structure deviation correction and repair based on polymer chemical debonding, and the deformation and evolution behavior of the ballastless track interlayer structure during deviation correction and repair. The results show that by polymer chemical debonding and lifting technology, it ensure that the track structure is completely separated from the cement graded gravel layer, and significantly reduce the adhesion and friction between the base plate and the surface of the foundation bed, which creates conditions for the successful implementation of deviation correction. By the step-by-step loading and synchronous push control, the track slab and support layer are uniformly stressed and deformed synchronously. There is no track structure cracking loss, interlayer bonding failure or dislocation damage. The engineering tests show that the developed deviation correction technology can ensure the deviation correction and repair of the offset ballastless track structure without damaging the ballastless track structure.