复杂艰险山区铁路隧道内设站方案的探讨

Discussion on Layouts of Railway Station in Tunnel of Complex Mountainous Area

在崇山峻岭、河谷深切的西南山区,在横断山脉广布的青藏高原修建铁路,车站选址不仅直接影响前期工程投资和施工风险等方面的选线决策,也对后期运营便利和养护管理具有十分重要的意义。合理的站型可以为车站布点提供更大的灵活性,从而提高选线自由度、节省工程投资、降低施工风险。文章结合成兰铁路、六沾铁路和大瑞铁路等铁路的建设实例,介绍了在复杂艰险山区车站布设的"一线天"、"单头式"、"整体式"3种常见形式,深入分析了各自的优缺点,探讨了其适用情况及在具体工程中的选用原则,对类似铁路建设项目的勘察设计具有一定的参考意义。重点分析了单线铁路站型方案与综合选线的关系,困难条件下以"单头式"站型和"整体式"站型取代"一线天"站型,在提高选线自由度的同时,可节省投资、降低施工风险。

The construction of railway in the deep valleys and lofty mountains of southwest China and the Qinghai-Tibet Plateau where the Hengduan Mountains are widely distributed is extraordinary difficult and complex. The station location not only affects the decision of pre-construction investment and risks in the process of construction, but also has a big in- fluence on post-operation and maintenance management, Reasonable station layout can provide greater flexibility for the locate of stations, thus greatly improve the freedom of line selection ,save investment ,reduce project risks. This paper uses construction of line Chenglan, line Liuzhan and line Darui etc for examples, presents three major railway station layouts, deeply analyzes their advantages and weak points, discusses specific principles of these layouts. This paper provides reference to the design of similar railway construction projects the author focuses especially on single-track railway station-type solutions and comprehensive relationship line selection, under difficult conditions, ＂single-head＂ type and ＂ integral＂ type instead of ＂Slit-sky＂ type, degree of freedom at the same time improve the line selection can save investment and reduce construction risk.