Study on mechanical maintenance method of ballasted track of high-speed railway based on nonlinear discrete element theory

Abstract

To study the electrical performance of high-speed railway ballasted work and the long running and rotating characteristics of the bed, different design methods are adopted. The longitudinal and transverse resistance of the bed increases with the increase in the ballast grading width. When ballast particle gradation is the lowest interpolation between envelope line and envelope line boundary, the longitudinal and transverse resistance of the bed work according to special requirements. With the increase in the shoulder width, the transverse resistance of running bed increases, while the longitudinal resistance remains constant. When the shoulder width is more than 400 mm, the longitudinal and transverse resistance of the bed works according to the required specifications. Maintenance costs for the various ballasts running on high-speed trains are not cheap. The test results show that the workability can be reduced, and improved by using complete asphalt or stone instead of tussah. Daily cleaning work only accounts for about 10% of the tussah, especially emergency work and special riders should not spend time working. The rubber cushion in sleeper and asphalt concrete cushion in ballast have their advantages and disadvantages in improving the strength of bed. In fact, it should be stipulated in the case file.

Keywords

• discrete element method
• ballasted track
• mechanical maintenance
• nonlinear