中吉乌铁路吉国境内段限制坡度方案研究

Study on Ruling Gradient of the Kyrgyzstan Section of China-Kyrgyzstan Uzbekistan Railway

研究目的:中吉乌铁路吉尔吉斯斯坦境内段位于天山山系南天山的西部,穿越莫尔多套山、费尔干纳山,线路跨越吐尔尕特高山区、阿尔帕高原盆地区等10个地貌单元,线路附近最高点贾曼达万山高程4 205 m,最低点贾拉拉巴德高程722 m,相对高差3 483 m,地形高差巨大,工程地质条件复杂,吐尔尕特至马克马尔段采用1 435 mm标准轨距、马克马尔至贾拉拉巴德南段采用1 520 mm宽轨距,线路限制坡度的选择是项目研究的重点和难点。研究结论:(1)结合线路沿线地形地质条件、承担运输货物特点、列车牵引质量、机车选型、工程投资和综合经济性,对限制坡度分段进行研究;(2)标轨段重点对18‰、20‰、24‰、25‰四个方案,宽轨段重点对18‰、20‰、24‰、27‰四个方案进行了分析研究,为降低工程投资、提高项目经济性、匹配运输组织、优化运输条件、保障运营安全性,推荐中吉乌铁路吉国境内段限制坡度采用20‰方案;(3)本研究思路和方法可为境外铁路工程建设提供参考和借鉴。

Research purposes:The Kyrgyzstan Section of China-Kyrgyzstan-Uzbekistan Railway,locates at the western part of the southern Tianshan Mountains of the Tianshan Mountains.The railway crosses the Mordor Mountains,Fergana Mountains,the Turgay Mountains,the Altay Plateau Basin and other 10 geomorphic units.The highest point near the railway,Mount Jamandavan has a height of 4205 m,and the lowest point Jalalabad has a height difference of 722 m,with a relative height difference of 3483 m.The geological condition of railway engineering is complicated.1435 mm standard gauge is adopted for the section from Turkah to Makhmal,and 1520 mm wide gauge is adopted for the southern section from Makhmal to Jalalabad.This paper focused on the selection of the ruling gradient of the railway and the difficulties in the project institute.Research conclusions:(1)According to the characteristics and relevant specifications of the project,the paper considered the terrain and geological conditions along the railway,the characteristics of the cargo to be transported,the traction quality of the train,the selection of locomotive,and the project investment and the comprehensive economy.(2)The study of ruling gradient was divided into two sections.The standard rail section studied the four programs of 18‰,20‰,24‰and 25‰,and the wide rail section studied the four programs of 18‰,20‰,24‰and 27‰,and qualitative analysis of the above programs were carried out respectively.In order to reduce the project investment,improve the project economy,match the transportation organization,optimize the transportation conditions,and ensure the operation safety,it is recommended to adopt the 20‰scheme for ruling gradient of the Kyrgyzstan section of China-Kyrgyzstan-Uzbekistan railway.(3)The research ideas and methods can provide reference for the construction of the foreign railway.