张家界至吉首至怀化铁路凤凰站后穿越杭瑞高速方案比选研究

Comparison Study on the Scheme of Crossing the Hangrui Expressway After the Fenghuang Railway Station of the Zhangjiajie to Jishou to Huaihua Railway

张家界至吉首至怀化铁路位于湖南西部,衔接黔张常铁路、怀邵衡铁路、沪昆客专。张吉怀铁路在凤凰县境内设站后,随即与杭瑞高速公路交叉并跨越沱江,文中从地质条件、工程投资、工程风险等方面对上跨和下穿杭瑞高速公路方案进行对比研究,并且重点考虑2个方案对长期运营的影响,折算动车组走行费用纳入比较,综合分析后推荐纵断面坡度条件更优的下穿杭瑞高速公路方案。

The Zhangjiajie to Jishou to Huaihua railway is located in the west of Hunan,and it links up the Qianzhangchang railway,the Huaishaoheng railway and the Hukun passenger rail line.After the railway station was set up in Fenghuang,the railway crossed the Hangrui expressway and the Tuojiang river.From the aspects of geological conditions,engineering investment and engineering risk,a comparative analysis on overcrossing and undercrossing the Hangrui expressway is made.Moreover,the impact of the two schemes on the long-term operation is mainly considered,and the comparison of the high speed trains operating costs is included.After comprehensive consideration,the scheme of undercrossing the Hangrui expressway is recommended,which has the better condition of railway profile