Discussion on track technical standards and design schemes of urban express line
At present,urban express lines are developing rapidly,yet a unified standard has not been formed in terms of track system design.In this article,the key technical standards affecting route smoothness and ride comfort are studied through analyzing the characteristics of urban express line and comparing the differences between urban express lines,intercity railways and metros;the key contents garnering attention in the design of urban express line tracks are demonstrated in a comprehensive manner.The design suggestions are ultimately formed as follows:to ensure high smoothness of lines,the technical standards for curve super elevation settings,track laying accuracy,and settlement controls of tunnel structure are suggested to consist with the intercity railways to the largest practical extent;long fixed length rails shall be prioritized for intercity express lines;ballastless tracks are recommended for underground and elevated lines of intercity express lines;the full-welding method is recommended for continuous welded rail;track damping measures shall ensure the stability and smoothness of lines.Also,special attention shall be paid to matching vehicles with line conditions in different speed sections to avoid defects such as wheel-rail abnormal wear.
NETL
NSTL
万方数据
维普
