This paper preliminarily explores the selection range of longitudinal slope for adding stations in existing line renovation project, analyzing the requirements for longitudinal slope from several perspectives, including train stopping smoothness, train starting and braking, station longitudinal drainage, station building and accessibility design, station platform door installation, and station wiring. Some conclusions are presented: (1) Verifying the technical performance of parking braking, starting, and braking of subway trains is the key to determining whether the longitudinal slope of adding stations to existing line sections can be moderately increased; (2) Considering the parking and braking performance of subway trains, as well as the technical performance of train starting and braking, the longitudinal slope of the station should be allowed to be moderately increased. However, considering the design of the station building and the convenience of passenger use, the increase should not be too large; (3) From the perspective of maintenance and repair of switches, it is recommended to ensure that the longitudinal slope of switches does not exceed the existing regulation of 10%.

metro  /  existing line renovation  /  additional stations  /  gradient