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| Selection of Ruling Grade for Xinjiang Jinyangguang Railway Special Line |
| HU Chun - lei |
| (China Railway Siyuan Survey and Design Group Co. Ltd，Wuhan，Hubei 430063，China) |
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Abstract Research purposes ： Xinjiang Jinyangguang railway special line mainly undertakes iron ore transportation task. Project is located in the centre of Xinjiang and middle - low mountains of Tianshan Mountainswith big rising and falling topography，the relative height diference of more than 1 000 m. The most of planed tunnels for the railway will be the large tunnels one after another，so it is difficult to build this railway. Ruling grade for Xinjiang Jinyangguang railway special line is determined by analyzing the factors which influence the choice of ruling grade wit!i concrete conditions of Xinjiang Jinyangguang special railway to provide the reference for the similar worlds. Research conclusions ：( 1 ) By setting switch - back curve， the maximum ruling grade and the tunnels length are reduced. (2) The ruling grade is different，the project investment is obviously different. Combining the comprehensive analysis of project cost，Xinjiang Jinyangguang railway special line has been recommended to adopt tiie ruling grade ： up line 6 ‰ and down line 22 ‰. ( 3 ) The research result can be as the basis for the selection of ruling grade for the mountain railway with the complex topographical conditions.
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Received: 24 November 2015
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2016, Vol. 33 
