日喀则至亚东铁路线路限制坡度方案研究

日喀则至亚东铁路需穿越喜马拉雅山脉,需克服南北麓的巨大高差,其中最困难段帕里至亚东段航空距离37 km,高差1 300 m。考虑本线研究年度内客货运量相对较小,本段应采用较大的线路坡度,选择合理的机车类型,对缩短线路长度,降低工程投资有重要意义。通过从地形地貌、机车性能、工程设置、运营安全及投资等方面对不同坡度方案进行分析比选,推荐日喀则至亚东铁路帕里至亚东段采用30‰限制坡度方案及HXD2双机牵引,研究成果对高差大的地形条件下限制坡度的选择具有一定的指导和借鉴意义。

Research on Limiting Gradient for Shigatse-Yadong Railway

The Shigatse to Yadong railway crosses the Himalaya Mountains and it needs to overcome the great height-difference between the north and the south. The distance between Pagri to Yadong is 37 km and the height difference is 1 300 m, and it is the most difficult section of all. The adoption of a larger track gradient and appropriate locomotive is of great significance to reduce the route length and lower the project investment. The analysis of different gradient schemes in terms of the topography and geomorphology, locomotive performance, engineering setting, operation safety and investment recommends 30‰ gradient scheme and HXD2 with double locomotive traction on the railway between Pagri to Yadong. The research results can be used as guidance and reference for the selection of limiting gradient in the terrain with large difference in altitude.