Abstract：Research purposes: According to the current situations，topographic conditions and geological conditions along the railway from Nanjing to Xihn(Nanyang—Hefei district)，the recommended speed target value for upgrading Nanjing—Xi’an Railway is offered after making analyses of the railway functions．traffic demands and matching relation with neighbour railway and comparing many schemes in technology and economy．
Research conclusions: The speed target value for upgrading Nanjing—Xi’an Railway increases to 160 km／h because the topographty along the railway is flat，the minimum track curve radius is 1 600 m or above．In addition，dong so is to avoid bigger dismantling and changing for the railway and save the investment．The speed target value of 1 60 km/h is also designed for the additional second track of the railway to well match the existing track and neighbour railway according to the functional orientation of the railway that mainly undertakes freight transportation and simultaneously undertakes passenger transportation．
杨元明. 宁西铁路(南合段)扩能速度目标值研究[J]. 铁道工程学报, 2010, 27(8): 7-11.
YANG Yuan—ming. Research on Speed Target Value for Upgrading Nanjing—Xi"an Railway (Nanyang—Hefei Section). 铁道工程学报, 2010, 27(8): 7-11.
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2010, Vol. 27 
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