Design of Energy-saving Slope of Urban Rail Transit Line in Longitudinal Section

Taking Tianjin Metro Line B1 first phase project as an example, by calculating and simulating traction in software, the “V” type slope, single-face slope and “W” type slope are studied, and suggestions for appropriate set-up, optimized slope length and angle of energy-saving slope under various working conditions are proposed. Main research conclusions are: with the “V” type slope, slope angle of 22~24‰ and slope length of about 250 meters are recommended; when adopting single-face slope, a combination of steep slope and gentle slope is recommended; for the long-wide section, “W” type slope is recommended. Application in practical engineering project is enrolled for verification. Results show that adopting optimized slope angle and length can effectively reduce the traction energy consumption of metro operation.