Experimental Study on Particle Erosion of Ballastless Track Interlayer
The interlayer interface is a weak link of ballastless track,susceptible to the development of interlayer separation joints under long-term loading.Once water infiltrates the separation joints,it can easily cause slurry damage.To study the mechanism of interlayer grouting of the ballastless track under train loading,a simulation device for interlayer detachment of the ballastless track was designed.Using this device,particle erosion tests were conducted on the interlayer of the ballastless track.A binocular 3D scanner was employed to acquire data on the concrete surface morphology.Contour maps depicting the surface morphology of concrete before and after erosion were generated following data processing.The changes in the surface morphology of concrete before and after particle flow erosion were compared,and the effects of concrete mix ratio,particle flow characteristics,and particle size on concrete surface erosion were studied.The results show that after 9 million cycles of high-frequency loading,the average erosion depth on the surface of C15 concrete is about 1.106 mm,and the average erosion depth on the surface of C40 concrete is 0.186 mm.Under the action of particle flow erosion,the rough peak erosion on the concrete surface is relatively large.Concrete surface erosion exhibits a positive correlation with both particle flow velocity and concrete mix ratio,while showing a negative correlation with particle size.
万方数据
维普
