大同至西安客运专线最大坡度的选择

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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．

Key words： Datong － Xi＇an Passenger Dedicated Railway maximum gradient technical standards

Received: 20 December 2010

PACS:

U291

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Cite this article:

MIAO Ming － ming. Research on Selection of Maximum Gradient for Datong － Xi ＇an Passenger Dedicated Railway[J]. 铁道工程学报, 2011, 28(2): 56-60.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2011/V28/I2/56

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