Abstract：Research purposes: The section between Huozhou － Hongdong of Datong － Xi＇an Passenger Dedicated Line had to cross the Huoshan mountain chain with steep terrain． In order to effectively decrease the negative impact of 24． 7 km long tunnel with unfavorable geological condition on the railway construction and operation，the research was done on the maximum gradient value for the railway．
Research conclusions: The discussion and technical and economic comparison were made for three schemes of 20‰ gradient，25‰ gradient and 30‰ gradient in the Huoshan crossing section，and the simulations of acceleration and breaking performances of the 250 － 300 km / h EMU running on long slope were made． If the 30‰ gradient was used， the Huoshan long slope tunnel could be cancelled and the construction investment could be saved． So the 30‰ gradient was determined as the maximum gradient in some difficult sections of this railway．
缪铭铭. 大同至西安客运专线最大坡度的选择[J]. 铁道工程学报, 2011, 28(2): 56-60.
MIAO Ming － ming. Research on Selection of Maximum Gradient for Datong － Xi ＇an Passenger Dedicated Railway. 铁道工程学报, 2011, 28(2): 56-60.
Zuo Feng． Analysis of Selection of Target Speed Value and Limit Slope Standard of Qingdao － Lianyungang Railway［J］． Journal of Railway Engineering Society， 2009( 12) : 30 － 34．
Bai Baoying． Applied Analysis and Study of Plane Design Standard for High － speed Railway［J］． Journal of Railway Engineering Society，2009( 6) : 50 － 53．
［3］ TB 10621—2009，高速铁路设计规范( 试行) ［S］．
TB 10621—2009， Code for Design of High Speed Railway ( Tentative) ［S］．
Railway Transportation Missive ［2008 ］ No． 647， Comprehensive Performance Test and Evaluation Implement Scheme of CRH3 Multiple Unit with the Speed of 350km /h ［S］．
The Third Railway Survey and Design Institute Co． Ltd． Datong to Xi’an Railway Feasibility Study Report ［R］． Tianjin: The Third Railway Survey and Design Institute Co． Ltd，2009．
The Third Railway Survey and Design Institute Co． Ltd． Beijing to Tianjin Intercity Railway Feasibility Study Report ［R］． Tianjin: The Third Railway Survey and Design Institute Co． Ltd，2004．
2011, Vol. 28 
版权所有 © 2014 《铁道工程学报》编辑部