|
|
|
| Research on the Key Parameters of Plane and Profile for Heavy Haul Railway |
| LONG Xu - you1，SHI Jin2，WANG Ying - jie2 |
| (1. TheThird Railway Survey and Design Institute Group Corporation，Tianjin 300142, China; 2. Beijing Jiaotong University，Beijing 100044，China) |
|
|
|
|
Abstract Research purposes： Heavy haul transportation has been internationally recognized as the direction of the development of railway freight. At present the track alignment of heavy haul railway is lack of system research，and the corresponding standard is based on * Code for Design of Railway Line”，which focuses primarily on mixed passenger and freight railway. This paper investigated the key parameters of plane and profile for heavy haul railway line based on the current practical situations and construction requirements of heavy haul railway，and then the recommended values were proposed. Research conclusions :( 1) The minimum curve radius of heavy haul railway should not be less than 800 m at the speed of 120 km/h. ( 2 ) The minimum length of intermediate straight line should be greater than 0. 6 v on the general conditions and 0. 3 v on the difficult conditions，no matter the reverse curve is on the bridge or the general subgrade section. ( 3 ) The profile slope of the curve may not be reduced on curved track or tunnel sections when the slope is less than 6. 9‰ for the million - ton train with the traction by two locomotives. ( 4 ) Since the maximum force of freight car coupler caused by the algebraic difference between adjacent gradients of adjacent grade section is less than the carrying capacity of the coupler，the maximum algebraic difference between adjacent gradients could not be restricted. (5) The minimum length of grade section for heavy haul railway could be consistent with the design standard for ordinary railway. (6 ) The research results can provide scientific reference for parameter selection of track alignment of heavy haul railway.
|
|
Received: 30 August 2015
|
|
|
|
|
|
|
2016, Vol. 33 
