Abstract：Research purposes: The study on the schemes for the railway passing the Liupan mountain area is crucial to the selection of the schemes for the extended second line of Baoji － Zhongwei Railway． As the geological condition of this area is complex，the geological factors of controlling the railway line schemes involves in the many geological conditions， such as the landslide，debris flow，geological structure，seismic region，high ground stress，the soft tunnel wall rock and hydrogeological conditions． The engineering geological alignment is crucial to the scheme for railway passing through the Liupan mountain area．
Research conclusions: From the comparison of the geological conditions of the various schemes，it is concluded that with the west slope equalization scheme of building two extra － long tunnel through Liupan mountain area，the railway and tunnel can keep away from the area with unfavorable geological condition and the main fault zone，and the tunnel wall is of single lithology cretaceous stratum with less portal and short shallow section． In this way，the risks of construction and operation of the railway in the Liupan mountain area where earthquake occurs frequently are much cut，and the engineering geological condition is optimal．
刘晓东. 宝中铁路增建二线六盘山区工程地质选线[J]. 铁道工程学报, 2011, 28(12): 25-30.
LIU Xiao － dong. Engineering Geological Alignment of Extended Second Line of Baoji －Zhongwei Railway in Liupan Mountain Area. 铁道工程学报, 2011, 28(12): 25-30.
China Railway First Survey and Design Institute Group Ltd． Feasibility Study on the Extended Second Line of the Renovated Railway of Baoji － Zhongwei Line Part 4 Geology［R］． Xi’an: China Railway First Survey and Design Institute Group Ltd，2011．
Ministry of Railway the First Survey and Design Institute． Preliminary Study on the Renovated Railway of Baoji － Zhongwei Line Part 4 Geology ［R］． Lanzhou: Ministry of Railway the First Survey and Design Institute，1986．
［3］ TB 10012—2007，铁路工程地质勘察规范［S］．
TB 10012—2007，Code for Geology Investigation of Railway Engineering［S］．
［4］ GBJ 50111—2006，铁路工程抗震设计规范 ［S］．
GBJ 50111—2006，Code for Seismic Design of Railway Engineering［S］．
China Seismological Bureau Crust Stress Institute． New Liupan Mountain Tunnel Preliminary Ground Stress Test Results of Extended Second Line of Baoji － Zhongwei Railway ［R］． Beijing: China Seismological Bureau Crust Stress Institute，2011．
2011, Vol. 28 
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